diff --git a/gstreamer/src/meta.rs b/gstreamer/src/meta.rs
index 1dca4bbc7..d1f697ff8 100644
--- a/gstreamer/src/meta.rs
+++ b/gstreamer/src/meta.rs
@@ -473,7 +473,7 @@ impl<'a, T, U> MetaRefMut<'a, T, U> {
     }
 
     #[inline]
-    pub fn upcast_mut(&mut self) -> &MetaRefMut<'a, Meta, U> {
+    pub fn upcast_mut(&mut self) -> &mut MetaRefMut<'a, Meta, U> {
         unsafe { &mut *(self as *mut MetaRefMut<'a, T, U> as *mut MetaRefMut<'a, Meta, U>) }
     }