diff --git a/gstreamer-app/src/app_sink.rs b/gstreamer-app/src/app_sink.rs
index b4f3770e6..40823cf15 100644
--- a/gstreamer-app/src/app_sink.rs
+++ b/gstreamer-app/src/app_sink.rs
@@ -11,7 +11,6 @@ use ffi;
 use gst_ffi;
 use glib::translate::*;
 use gst;
-use std::mem::transmute;
 use glib::source::CallbackGuard;
 use glib_ffi::gpointer;
 use std::ptr;
@@ -51,7 +50,7 @@ impl AppSinkCallbacks {
 
 unsafe extern "C" fn trampoline_eos(appsink: *mut ffi::GstAppSink, callbacks: gpointer) {
     let _guard = CallbackGuard::new();
-    let callbacks: &AppSinkCallbacks = transmute(callbacks);
+    let callbacks = &*(callbacks as *const AppSinkCallbacks);
 
     (callbacks.eos)(&from_glib_none(appsink));
 }
@@ -61,7 +60,7 @@ unsafe extern "C" fn trampoline_new_preroll(
     callbacks: gpointer,
 ) -> gst_ffi::GstFlowReturn {
     let _guard = CallbackGuard::new();
-    let callbacks: &AppSinkCallbacks = transmute(callbacks);
+    let callbacks = &*(callbacks as *const AppSinkCallbacks);
 
     (callbacks.new_preroll)(&from_glib_none(appsink)).to_glib()
 }
@@ -71,7 +70,7 @@ unsafe extern "C" fn trampoline_new_sample(
     callbacks: gpointer,
 ) -> gst_ffi::GstFlowReturn {
     let _guard = CallbackGuard::new();
-    let callbacks: &AppSinkCallbacks = transmute(callbacks);
+    let callbacks = &*(callbacks as *const AppSinkCallbacks);
 
     (callbacks.new_sample)(&from_glib_none(appsink)).to_glib()
 }
diff --git a/gstreamer-app/src/app_src.rs b/gstreamer-app/src/app_src.rs
index 9bb7a6e81..292745127 100644
--- a/gstreamer-app/src/app_src.rs
+++ b/gstreamer-app/src/app_src.rs
@@ -10,7 +10,6 @@ use AppSrc;
 use ffi;
 use glib::translate::*;
 use gst;
-use std::mem::transmute;
 use glib::source::CallbackGuard;
 use glib_ffi::{gboolean, gpointer};
 use std::ptr;
@@ -54,14 +53,14 @@ unsafe extern "C" fn trampoline_need_data(
     callbacks: gpointer,
 ) {
     let _guard = CallbackGuard::new();
-    let callbacks: &AppSrcCallbacks = transmute(callbacks);
+    let callbacks = &*(callbacks as *const AppSrcCallbacks);
 
     (callbacks.need_data)(&from_glib_none(appsrc), length);
 }
 
 unsafe extern "C" fn trampoline_enough_data(appsrc: *mut ffi::GstAppSrc, callbacks: gpointer) {
     let _guard = CallbackGuard::new();
-    let callbacks: &AppSrcCallbacks = transmute(callbacks);
+    let callbacks = &*(callbacks as *const AppSrcCallbacks);
 
     (callbacks.enough_data)(&from_glib_none(appsrc));
 }
@@ -72,7 +71,7 @@ unsafe extern "C" fn trampoline_seek_data(
     callbacks: gpointer,
 ) -> gboolean {
     let _guard = CallbackGuard::new();
-    let callbacks: &AppSrcCallbacks = transmute(callbacks);
+    let callbacks = &*(callbacks as *const AppSrcCallbacks);
 
     (callbacks.seek_data)(&from_glib_none(appsrc), offset).to_glib()
 }
diff --git a/gstreamer/src/event.rs b/gstreamer/src/event.rs
index 05aee4914..2986c7f08 100644
--- a/gstreamer/src/event.rs
+++ b/gstreamer/src/event.rs
@@ -15,8 +15,10 @@ use std::mem;
 use std::ffi::CStr;
 
 use glib;
-use glib::translate::{from_glib, from_glib_full, from_glib_none, FromGlibPtrContainer, ToGlib,
-                      ToGlibPtr};
+use glib::translate::{from_glib, from_glib_full, from_glib_none, ToGlib, ToGlibPtr};
+
+#[cfg(feature = "v1_10")]
+use glib::translate::FromGlibPtrContainer;
 
 #[repr(C)]
 pub struct EventRef(ffi::GstEvent);
@@ -930,9 +932,11 @@ impl EosBuilder {
     event_builder_generic_impl!(|_| ffi::gst_event_new_eos());
 }
 
+// TODO Toc
 pub struct TocBuilder {
     seqnum: Option<u32>,
     running_time_offset: Option<i64>,
+    #[allow(unused)]
     toc: (),
     updated: bool,
 }
diff --git a/gstreamer/src/message.rs b/gstreamer/src/message.rs
index 6d90fe2a4..b4146fd5a 100644
--- a/gstreamer/src/message.rs
+++ b/gstreamer/src/message.rs
@@ -1122,6 +1122,7 @@ pub struct ErrorBuilder<'a> {
     seqnum: Option<u32>,
     error: &'a glib::Error,
     debug: Option<&'a str>,
+    #[allow(unused)]
     details: Option<Structure>,
 }
 impl<'a> ErrorBuilder<'a> {
@@ -1181,6 +1182,7 @@ pub struct WarningBuilder<'a> {
     seqnum: Option<u32>,
     error: &'a glib::Error,
     debug: Option<&'a str>,
+    #[allow(unused)]
     details: Option<Structure>,
 }
 impl<'a> WarningBuilder<'a> {
@@ -1240,6 +1242,7 @@ pub struct InfoBuilder<'a> {
     seqnum: Option<u32>,
     error: &'a glib::Error,
     debug: Option<&'a str>,
+    #[allow(unused)]
     details: Option<Structure>,
 }
 impl<'a> InfoBuilder<'a> {
@@ -1890,6 +1893,7 @@ impl<'a> ProgressBuilder<'a> {
 pub struct TocBuilder {
     src: Option<Object>,
     seqnum: Option<u32>,
+    #[allow(unused)]
     toc: (),
     updated: bool,
 }
@@ -1984,6 +1988,7 @@ impl<'a> NeedContextBuilder<'a> {
 pub struct HaveContextBuilder {
     src: Option<Object>,
     seqnum: Option<u32>,
+    #[allow(unused)]
     context: (),
 }
 impl HaveContextBuilder {
@@ -1991,11 +1996,11 @@ impl HaveContextBuilder {
         Self {
             src: None,
             seqnum: None,
-            context: (),
+            context: context,
         }
     }
 
-    message_builder_generic_impl!(|s: &mut Self, src| {
+    message_builder_generic_impl!(|_, src| {
         ffi::gst_message_new_have_context(src, ptr::null_mut() /*s.context.to_glib_full().0*/)
     });
 }
@@ -2038,6 +2043,7 @@ impl<'a> DeviceRemovedBuilder<'a> {
     });
 }
 
+#[cfg(feature = "v1_10")]
 pub struct PropertyNotifyBuilder<'a> {
     src: Option<Object>,
     seqnum: Option<u32>,
@@ -2123,6 +2129,7 @@ impl<'a> StreamsSelectedBuilder<'a> {
     });
 }
 
+#[cfg(feature = "v1_10")]
 pub struct RedirectBuilder<'a> {
     src: Option<Object>,
     seqnum: Option<u32>,