diff --git a/gstreamer-base/src/aggregator_pad.rs b/gstreamer-base/src/aggregator_pad.rs
index 915d13e41..a168fabc1 100644
--- a/gstreamer-base/src/aggregator_pad.rs
+++ b/gstreamer-base/src/aggregator_pad.rs
@@ -21,7 +21,7 @@ impl<O: IsA<AggregatorPad>> AggregatorPadExtManual for O {
     fn get_segment(&self) -> gst::Segment {
         unsafe {
             let ptr: &gst_base_sys::GstAggregatorPad = &*(self.as_ptr() as *const _);
-            ::utils::MutexGuard::lock(&ptr.parent.object.lock);
+            let _guard = ::utils::MutexGuard::lock(&ptr.parent.object.lock);
             from_glib_none(&ptr.segment as *const gst_sys::GstSegment)
         }
     }
diff --git a/gstreamer-base/src/base_sink.rs b/gstreamer-base/src/base_sink.rs
index 8eed32cfe..a2dd468e0 100644
--- a/gstreamer-base/src/base_sink.rs
+++ b/gstreamer-base/src/base_sink.rs
@@ -39,7 +39,7 @@ impl<O: IsA<BaseSink>> BaseSinkExtManual for O {
     fn get_segment(&self) -> gst::Segment {
         unsafe {
             let sink: &gst_base_sys::GstBaseSink = &*(self.as_ptr() as *const _);
-            ::utils::MutexGuard::lock(&sink.element.object.lock);
+            let _guard = ::utils::MutexGuard::lock(&sink.element.object.lock);
             from_glib_none(&sink.segment as *const _)
         }
     }
diff --git a/gstreamer-base/src/base_src.rs b/gstreamer-base/src/base_src.rs
index 506eb7fdf..2b1225569 100644
--- a/gstreamer-base/src/base_src.rs
+++ b/gstreamer-base/src/base_src.rs
@@ -29,7 +29,7 @@ impl<O: IsA<BaseSrc>> BaseSrcExtManual for O {
     fn get_segment(&self) -> gst::Segment {
         unsafe {
             let src: &gst_base_sys::GstBaseSrc = &*(self.as_ptr() as *const _);
-            ::utils::MutexGuard::lock(&src.element.object.lock);
+            let _guard = ::utils::MutexGuard::lock(&src.element.object.lock);
             from_glib_none(&src.segment as *const _)
         }
     }
diff --git a/gstreamer-base/src/base_transform.rs b/gstreamer-base/src/base_transform.rs
index 557325061..f783814a7 100644
--- a/gstreamer-base/src/base_transform.rs
+++ b/gstreamer-base/src/base_transform.rs
@@ -20,7 +20,7 @@ impl<O: IsA<BaseTransform>> BaseTransformExtManual for O {
     fn get_segment(&self) -> gst::Segment {
         unsafe {
             let trans: &gst_base_sys::GstBaseTransform = &*(self.as_ptr() as *const _);
-            ::utils::MutexGuard::lock(&trans.element.object.lock);
+            let _guard = ::utils::MutexGuard::lock(&trans.element.object.lock);
             from_glib_none(&trans.segment as *const _)
         }
     }
diff --git a/gstreamer/src/bin.rs b/gstreamer/src/bin.rs
index 48427e6a9..ccba7df90 100644
--- a/gstreamer/src/bin.rs
+++ b/gstreamer/src/bin.rs
@@ -157,7 +157,7 @@ impl<O: IsA<Bin>> GstBinExtManual for O {
     fn get_children(&self) -> Vec<Element> {
         unsafe {
             let bin: &gst_sys::GstBin = &*(self.as_ptr() as *const _);
-            ::utils::MutexGuard::lock(&bin.element.object.lock);
+            let _guard = ::utils::MutexGuard::lock(&bin.element.object.lock);
             FromGlibPtrContainer::from_glib_none(bin.children)
         }
     }
diff --git a/gstreamer/src/element.rs b/gstreamer/src/element.rs
index 99f7e6509..4e5d93ef2 100644
--- a/gstreamer/src/element.rs
+++ b/gstreamer/src/element.rs
@@ -505,7 +505,7 @@ impl<O: IsA<Element>> ElementExtManual for O {
     fn get_pads(&self) -> Vec<Pad> {
         unsafe {
             let elt: &gst_sys::GstElement = &*(self.as_ptr() as *const _);
-            ::utils::MutexGuard::lock(&elt.object.lock);
+            let _guard = ::utils::MutexGuard::lock(&elt.object.lock);
             FromGlibPtrContainer::from_glib_none(elt.pads)
         }
     }
@@ -513,7 +513,7 @@ impl<O: IsA<Element>> ElementExtManual for O {
     fn get_sink_pads(&self) -> Vec<Pad> {
         unsafe {
             let elt: &gst_sys::GstElement = &*(self.as_ptr() as *const _);
-            ::utils::MutexGuard::lock(&elt.object.lock);
+            let _guard = ::utils::MutexGuard::lock(&elt.object.lock);
             FromGlibPtrContainer::from_glib_none(elt.sinkpads)
         }
     }
@@ -521,7 +521,7 @@ impl<O: IsA<Element>> ElementExtManual for O {
     fn get_src_pads(&self) -> Vec<Pad> {
         unsafe {
             let elt: &gst_sys::GstElement = &*(self.as_ptr() as *const _);
-            ::utils::MutexGuard::lock(&elt.object.lock);
+            let _guard = ::utils::MutexGuard::lock(&elt.object.lock);
             FromGlibPtrContainer::from_glib_none(elt.srcpads)
         }
     }
@@ -529,7 +529,7 @@ impl<O: IsA<Element>> ElementExtManual for O {
     fn num_pads(&self) -> u16 {
         unsafe {
             let elt: &gst_sys::GstElement = &*(self.as_ptr() as *const _);
-            ::utils::MutexGuard::lock(&elt.object.lock);
+            let _guard = ::utils::MutexGuard::lock(&elt.object.lock);
             elt.numpads
         }
     }
@@ -537,7 +537,7 @@ impl<O: IsA<Element>> ElementExtManual for O {
     fn num_sink_pads(&self) -> u16 {
         unsafe {
             let elt: &gst_sys::GstElement = &*(self.as_ptr() as *const _);
-            ::utils::MutexGuard::lock(&elt.object.lock);
+            let _guard = ::utils::MutexGuard::lock(&elt.object.lock);
             elt.numsinkpads
         }
     }
@@ -545,7 +545,7 @@ impl<O: IsA<Element>> ElementExtManual for O {
     fn num_src_pads(&self) -> u16 {
         unsafe {
             let elt: &gst_sys::GstElement = &*(self.as_ptr() as *const _);
-            ::utils::MutexGuard::lock(&elt.object.lock);
+            let _guard = ::utils::MutexGuard::lock(&elt.object.lock);
             elt.numsrcpads
         }
     }