diff --git a/gstreamer-video/src/video_time_code.rs b/gstreamer-video/src/video_time_code.rs
index 6a3a9a660..a46807dfa 100644
--- a/gstreamer-video/src/video_time_code.rs
+++ b/gstreamer-video/src/video_time_code.rs
@@ -444,6 +444,8 @@ macro_rules! generic_impl {
             type Type = Self;
         }
 
+        impl glib::value::ValueTypeOptional for $name {}
+
         #[doc(hidden)]
         unsafe impl<'a> glib::value::FromValue<'a> for $name {
             type Checker = glib::value::GenericValueTypeOrNoneChecker<Self>;
diff --git a/gstreamer-video/src/video_time_code_interval.rs b/gstreamer-video/src/video_time_code_interval.rs
index 697a0c379..0f88497ca 100644
--- a/gstreamer-video/src/video_time_code_interval.rs
+++ b/gstreamer-video/src/video_time_code_interval.rs
@@ -210,6 +210,8 @@ impl glib::value::ValueType for VideoTimeCodeInterval {
     type Type = Self;
 }
 
+impl glib::value::ValueTypeOptional for VideoTimeCodeInterval {}
+
 #[doc(hidden)]
 unsafe impl<'a> glib::value::FromValue<'a> for VideoTimeCodeInterval {
     type Checker = glib::value::GenericValueTypeOrNoneChecker<Self>;
diff --git a/gstreamer/src/caps_features.rs b/gstreamer/src/caps_features.rs
index 44af326ea..d50bf101e 100644
--- a/gstreamer/src/caps_features.rs
+++ b/gstreamer/src/caps_features.rs
@@ -235,6 +235,8 @@ impl glib::value::ValueType for CapsFeatures {
     type Type = Self;
 }
 
+impl glib::value::ValueTypeOptional for CapsFeatures {}
+
 unsafe impl<'a> glib::value::FromValue<'a> for CapsFeatures {
     type Checker = glib::value::GenericValueTypeOrNoneChecker<Self>;
 
diff --git a/gstreamer/src/iterator.rs b/gstreamer/src/iterator.rs
index 814c2c1f9..b059b8de1 100644
--- a/gstreamer/src/iterator.rs
+++ b/gstreamer/src/iterator.rs
@@ -502,6 +502,8 @@ impl<T: StaticType + 'static> glib::value::ValueType for Iterator<T> {
     type Type = Self;
 }
 
+impl<T: StaticType + 'static> glib::value::ValueTypeOptional for Iterator<T> {}
+
 unsafe impl<'a, T: StaticType + 'static> glib::value::FromValue<'a> for Iterator<T> {
     type Checker = glib::value::GenericValueTypeOrNoneChecker<Self>;
 
diff --git a/gstreamer/src/miniobject.rs b/gstreamer/src/miniobject.rs
index 6cf41614a..71d190674 100644
--- a/gstreamer/src/miniobject.rs
+++ b/gstreamer/src/miniobject.rs
@@ -462,6 +462,8 @@ macro_rules! mini_object_wrapper (
             type Type = Self;
         }
 
+        impl glib::value::ValueTypeOptional for $name { }
+
         unsafe impl<'a> $crate::glib::value::FromValue<'a> for $name {
             type Checker = $crate::glib::value::GenericValueTypeOrNoneChecker<Self>;
 
diff --git a/gstreamer/src/structure.rs b/gstreamer/src/structure.rs
index cb39ab661..0b1286941 100644
--- a/gstreamer/src/structure.rs
+++ b/gstreamer/src/structure.rs
@@ -306,6 +306,8 @@ impl glib::value::ValueType for Structure {
     type Type = Self;
 }
 
+impl glib::value::ValueTypeOptional for Structure {}
+
 unsafe impl<'a> glib::value::FromValue<'a> for Structure {
     type Checker = glib::value::GenericValueTypeOrNoneChecker<Self>;