diff --git a/gstreamer-check/src/harness.rs b/gstreamer-check/src/harness.rs
index 7f5c8bbf3..ead79e39a 100644
--- a/gstreamer-check/src/harness.rs
+++ b/gstreamer-check/src/harness.rs
@@ -22,10 +22,7 @@ use std::ptr;
 use TestClock;
 
 #[derive(Debug)]
-pub struct Harness(
-    ptr::NonNull<gst_check_sys::GstHarness>,
-    PhantomData<gst_check_sys::GstHarness>,
-);
+pub struct Harness(ptr::NonNull<gst_check_sys::GstHarness>);
 
 impl Drop for Harness {
     fn drop(&mut self) {
@@ -567,7 +564,7 @@ impl Harness {
     unsafe fn from_glib_full(ptr: *mut gst_check_sys::GstHarness) -> Harness {
         assert!(!ptr.is_null());
 
-        Harness(ptr::NonNull::new_unchecked(ptr), PhantomData)
+        Harness(ptr::NonNull::new_unchecked(ptr))
     }
 
     pub fn new(element_name: &str) -> Harness {
@@ -728,10 +725,7 @@ impl Harness {
                 None
             } else {
                 Some(Ref(
-                    mem::ManuallyDrop::new(Harness(
-                        ptr::NonNull::new_unchecked(sink_harness),
-                        PhantomData,
-                    )),
+                    mem::ManuallyDrop::new(Harness(ptr::NonNull::new_unchecked(sink_harness))),
                     PhantomData,
                 ))
             }
@@ -745,10 +739,7 @@ impl Harness {
                 None
             } else {
                 Some(Ref(
-                    mem::ManuallyDrop::new(Harness(
-                        ptr::NonNull::new_unchecked(src_harness),
-                        PhantomData,
-                    )),
+                    mem::ManuallyDrop::new(Harness(ptr::NonNull::new_unchecked(src_harness))),
                     PhantomData,
                 ))
             }
@@ -762,10 +753,7 @@ impl Harness {
                 None
             } else {
                 Some(RefMut(
-                    mem::ManuallyDrop::new(Harness(
-                        ptr::NonNull::new_unchecked(sink_harness),
-                        PhantomData,
-                    )),
+                    mem::ManuallyDrop::new(Harness(ptr::NonNull::new_unchecked(sink_harness))),
                     PhantomData,
                 ))
             }
@@ -779,10 +767,7 @@ impl Harness {
                 None
             } else {
                 Some(RefMut(
-                    mem::ManuallyDrop::new(Harness(
-                        ptr::NonNull::new_unchecked(src_harness),
-                        PhantomData,
-                    )),
+                    mem::ManuallyDrop::new(Harness(ptr::NonNull::new_unchecked(src_harness))),
                     PhantomData,
                 ))
             }
diff --git a/gstreamer-video/src/video_codec_state.rs b/gstreamer-video/src/video_codec_state.rs
index ba7087237..4bace6560 100644
--- a/gstreamer-video/src/video_codec_state.rs
+++ b/gstreamer-video/src/video_codec_state.rs
@@ -54,7 +54,6 @@ impl<'a> VideoCodecStateContext<'a> for Readable {
 pub struct VideoCodecState<'a, T: VideoCodecStateContext<'a>> {
     state: *mut gst_video_sys::GstVideoCodecState,
     pub(crate) context: T,
-    /* FIXME: should not be needed because lifetime is actually used */
     phantom: PhantomData<&'a T>,
 }
 
diff --git a/gstreamer/src/caps_features.rs b/gstreamer/src/caps_features.rs
index 5348b4424..1ee2488f7 100644
--- a/gstreamer/src/caps_features.rs
+++ b/gstreamer/src/caps_features.rs
@@ -9,7 +9,6 @@
 use std::borrow::{Borrow, BorrowMut, ToOwned};
 use std::ffi::CStr;
 use std::fmt;
-use std::marker::PhantomData;
 use std::mem;
 use std::ops::{Deref, DerefMut};
 use std::ptr;
@@ -26,7 +25,7 @@ use glib_sys::gpointer;
 use gobject_sys;
 use gst_sys;
 
-pub struct CapsFeatures(ptr::NonNull<CapsFeaturesRef>, PhantomData<CapsFeaturesRef>);
+pub struct CapsFeatures(ptr::NonNull<CapsFeaturesRef>);
 unsafe impl Send for CapsFeatures {}
 unsafe impl Sync for CapsFeatures {}
 
@@ -45,24 +44,18 @@ impl CapsFeatures {
     pub fn new_empty() -> Self {
         assert_initialized_main_thread!();
         unsafe {
-            CapsFeatures(
-                ptr::NonNull::new_unchecked(
-                    gst_sys::gst_caps_features_new_empty() as *mut CapsFeaturesRef
-                ),
-                PhantomData,
-            )
+            CapsFeatures(ptr::NonNull::new_unchecked(
+                gst_sys::gst_caps_features_new_empty() as *mut CapsFeaturesRef,
+            ))
         }
     }
 
     pub fn new_any() -> Self {
         assert_initialized_main_thread!();
         unsafe {
-            CapsFeatures(
-                ptr::NonNull::new_unchecked(
-                    gst_sys::gst_caps_features_new_any() as *mut CapsFeaturesRef
-                ),
-                PhantomData,
-            )
+            CapsFeatures(ptr::NonNull::new_unchecked(
+                gst_sys::gst_caps_features_new_any() as *mut CapsFeaturesRef,
+            ))
         }
     }
 
@@ -103,7 +96,7 @@ impl Clone for CapsFeatures {
         unsafe {
             let ptr = gst_sys::gst_caps_features_copy(&self.0.as_ref().0) as *mut CapsFeaturesRef;
             assert!(!ptr.is_null());
-            CapsFeatures(ptr::NonNull::new_unchecked(ptr), PhantomData)
+            CapsFeatures(ptr::NonNull::new_unchecked(ptr))
         }
     }
 }
@@ -143,10 +136,9 @@ impl str::FromStr for CapsFeatures {
                 ));
             }
 
-            Ok(CapsFeatures(
-                ptr::NonNull::new_unchecked(ptr as *mut CapsFeaturesRef),
-                PhantomData,
-            ))
+            Ok(CapsFeatures(ptr::NonNull::new_unchecked(
+                ptr as *mut CapsFeaturesRef,
+            )))
         }
     }
 }
@@ -206,10 +198,7 @@ impl FromGlibPtrNone<*const gst_sys::GstCapsFeatures> for CapsFeatures {
         assert!(!ptr.is_null());
         let ptr = gst_sys::gst_caps_features_copy(ptr);
         assert!(!ptr.is_null());
-        CapsFeatures(
-            ptr::NonNull::new_unchecked(ptr as *mut CapsFeaturesRef),
-            PhantomData,
-        )
+        CapsFeatures(ptr::NonNull::new_unchecked(ptr as *mut CapsFeaturesRef))
     }
 }
 
@@ -218,30 +207,21 @@ impl FromGlibPtrNone<*mut gst_sys::GstCapsFeatures> for CapsFeatures {
         assert!(!ptr.is_null());
         let ptr = gst_sys::gst_caps_features_copy(ptr);
         assert!(!ptr.is_null());
-        CapsFeatures(
-            ptr::NonNull::new_unchecked(ptr as *mut CapsFeaturesRef),
-            PhantomData,
-        )
+        CapsFeatures(ptr::NonNull::new_unchecked(ptr as *mut CapsFeaturesRef))
     }
 }
 
 impl FromGlibPtrFull<*const gst_sys::GstCapsFeatures> for CapsFeatures {
     unsafe fn from_glib_full(ptr: *const gst_sys::GstCapsFeatures) -> Self {
         assert!(!ptr.is_null());
-        CapsFeatures(
-            ptr::NonNull::new_unchecked(ptr as *mut CapsFeaturesRef),
-            PhantomData,
-        )
+        CapsFeatures(ptr::NonNull::new_unchecked(ptr as *mut CapsFeaturesRef))
     }
 }
 
 impl FromGlibPtrFull<*mut gst_sys::GstCapsFeatures> for CapsFeatures {
     unsafe fn from_glib_full(ptr: *mut gst_sys::GstCapsFeatures) -> Self {
         assert!(!ptr.is_null());
-        CapsFeatures(
-            ptr::NonNull::new_unchecked(ptr as *mut CapsFeaturesRef),
-            PhantomData,
-        )
+        CapsFeatures(ptr::NonNull::new_unchecked(ptr as *mut CapsFeaturesRef))
     }
 }
 
diff --git a/gstreamer/src/miniobject.rs b/gstreamer/src/miniobject.rs
index 39a41d0d2..decef0252 100644
--- a/gstreamer/src/miniobject.rs
+++ b/gstreamer/src/miniobject.rs
@@ -11,7 +11,6 @@ macro_rules! gst_define_mini_object_wrapper(
     ($name:ident, $ref_name:ident, $gst_sys_name:path, $get_type:expr) => {
         pub struct $name {
             obj: ::std::ptr::NonNull<$ref_name>,
-            phantom: ::std::marker::PhantomData<$ref_name>,
         }
 
         #[repr(C)]
@@ -26,7 +25,6 @@ macro_rules! gst_define_mini_object_wrapper(
 
                 $name {
                     obj: ::std::ptr::NonNull::new_unchecked(ptr as *mut $gst_sys_name as *mut $ref_name),
-                    phantom: ::std::marker::PhantomData,
                 }
             }
 
@@ -36,7 +34,6 @@ macro_rules! gst_define_mini_object_wrapper(
 
                 $name {
                     obj: ::std::ptr::NonNull::new_unchecked(ptr as *mut $gst_sys_name as *mut $ref_name),
-                    phantom: ::std::marker::PhantomData,
                 }
             }
 
@@ -46,7 +43,6 @@ macro_rules! gst_define_mini_object_wrapper(
 
                 $crate::glib::translate::Borrowed::new($name {
                     obj: ::std::ptr::NonNull::new_unchecked(ptr as *mut $gst_sys_name as *mut $ref_name),
-                    phantom: ::std::marker::PhantomData,
                 })
             }
 
diff --git a/gstreamer/src/structure.rs b/gstreamer/src/structure.rs
index a2f839f32..c2fd3def0 100644
--- a/gstreamer/src/structure.rs
+++ b/gstreamer/src/structure.rs
@@ -9,7 +9,6 @@
 use std::borrow::{Borrow, BorrowMut, ToOwned};
 use std::ffi::CStr;
 use std::fmt;
-use std::marker::PhantomData;
 use std::mem;
 use std::ops::{Deref, DerefMut};
 use std::ptr;
@@ -56,7 +55,7 @@ impl<'name> GetError<'name> {
     }
 }
 
-pub struct Structure(ptr::NonNull<StructureRef>, PhantomData<StructureRef>);
+pub struct Structure(ptr::NonNull<StructureRef>);
 unsafe impl Send for Structure {}
 unsafe impl Sync for Structure {}
 
@@ -71,7 +70,7 @@ impl Structure {
         unsafe {
             let ptr = gst_sys::gst_structure_new_empty(name.to_glib_none().0) as *mut StructureRef;
             assert!(!ptr.is_null());
-            Structure(ptr::NonNull::new_unchecked(ptr), PhantomData)
+            Structure(ptr::NonNull::new_unchecked(ptr))
         }
     }
 
@@ -143,7 +142,7 @@ impl Clone for Structure {
         unsafe {
             let ptr = gst_sys::gst_structure_copy(&self.0.as_ref().0) as *mut StructureRef;
             assert!(!ptr.is_null());
-            Structure(ptr::NonNull::new_unchecked(ptr), PhantomData)
+            Structure(ptr::NonNull::new_unchecked(ptr))
         }
     }
 }
@@ -192,10 +191,9 @@ impl str::FromStr for Structure {
             if structure.is_null() {
                 Err(glib_bool_error!("Failed to parse structure from string"))
             } else {
-                Ok(Structure(
-                    ptr::NonNull::new_unchecked(structure as *mut StructureRef),
-                    PhantomData,
-                ))
+                Ok(Structure(ptr::NonNull::new_unchecked(
+                    structure as *mut StructureRef,
+                )))
             }
         }
     }
@@ -220,7 +218,7 @@ impl ToOwned for StructureRef {
         unsafe {
             let ptr = gst_sys::gst_structure_copy(&self.0) as *mut StructureRef;
             assert!(!ptr.is_null());
-            Structure(ptr::NonNull::new_unchecked(ptr), PhantomData)
+            Structure(ptr::NonNull::new_unchecked(ptr))
         }
     }
 }
@@ -268,10 +266,7 @@ impl FromGlibPtrNone<*const gst_sys::GstStructure> for Structure {
         assert!(!ptr.is_null());
         let ptr = gst_sys::gst_structure_copy(ptr);
         assert!(!ptr.is_null());
-        Structure(
-            ptr::NonNull::new_unchecked(ptr as *mut StructureRef),
-            PhantomData,
-        )
+        Structure(ptr::NonNull::new_unchecked(ptr as *mut StructureRef))
     }
 }
 
@@ -280,30 +275,21 @@ impl FromGlibPtrNone<*mut gst_sys::GstStructure> for Structure {
         assert!(!ptr.is_null());
         let ptr = gst_sys::gst_structure_copy(ptr);
         assert!(!ptr.is_null());
-        Structure(
-            ptr::NonNull::new_unchecked(ptr as *mut StructureRef),
-            PhantomData,
-        )
+        Structure(ptr::NonNull::new_unchecked(ptr as *mut StructureRef))
     }
 }
 
 impl FromGlibPtrFull<*const gst_sys::GstStructure> for Structure {
     unsafe fn from_glib_full(ptr: *const gst_sys::GstStructure) -> Self {
         assert!(!ptr.is_null());
-        Structure(
-            ptr::NonNull::new_unchecked(ptr as *mut StructureRef),
-            PhantomData,
-        )
+        Structure(ptr::NonNull::new_unchecked(ptr as *mut StructureRef))
     }
 }
 
 impl FromGlibPtrFull<*mut gst_sys::GstStructure> for Structure {
     unsafe fn from_glib_full(ptr: *mut gst_sys::GstStructure) -> Self {
         assert!(!ptr.is_null());
-        Structure(
-            ptr::NonNull::new_unchecked(ptr as *mut StructureRef),
-            PhantomData,
-        )
+        Structure(ptr::NonNull::new_unchecked(ptr as *mut StructureRef))
     }
 }
 
diff --git a/gstreamer/src/typefind.rs b/gstreamer/src/typefind.rs
index 00651aee0..8a4f58de5 100644
--- a/gstreamer/src/typefind.rs
+++ b/gstreamer/src/typefind.rs
@@ -16,13 +16,12 @@ use TypeFindProbability;
 use glib;
 use glib::translate::*;
 use glib_sys;
-use std::marker::PhantomData;
 use std::ptr;
 use std::slice;
 
 #[repr(C)]
 #[derive(Debug)]
-pub struct TypeFind<'a>(gst_sys::GstTypeFind, PhantomData<&'a ()>);
+pub struct TypeFind(gst_sys::GstTypeFind);
 
 pub trait TypeFindImpl {
     fn peek(&mut self, offset: i64, size: u32) -> Option<&[u8]>;
@@ -32,7 +31,7 @@ pub trait TypeFindImpl {
     }
 }
 
-impl<'a> TypeFind<'a> {
+impl TypeFind {
     pub fn register<F>(
         plugin: Option<&Plugin>,
         name: &str,