diff --git a/gstreamer/src/child_proxy.rs b/gstreamer/src/child_proxy.rs
index 40776d093..a45e233bb 100644
--- a/gstreamer/src/child_proxy.rs
+++ b/gstreamer/src/child_proxy.rs
@@ -15,7 +15,7 @@ use ChildProxy;
 
 pub trait ChildProxyExtManual {
     fn get_child_property(&self, name: &str) -> Option<glib::Value>;
-    fn set_child_property(&self, name: &str, value: &glib::Value) -> Result<(), glib::BoolError>;
+    fn set_child_property(&self, name: &str, value: &glib::ToValue) -> Result<(), glib::BoolError>;
 }
 
 impl<O: IsA<ChildProxy>> ChildProxyExtManual for O {
@@ -41,7 +41,7 @@ impl<O: IsA<ChildProxy>> ChildProxyExtManual for O {
         }
     }
 
-    fn set_child_property(&self, name: &str, value: &glib::Value) -> Result<(), glib::BoolError> {
+    fn set_child_property(&self, name: &str, value: &glib::ToValue) -> Result<(), glib::BoolError> {
         unsafe {
             let found: bool = from_glib(ffi::gst_child_proxy_lookup(
                 self.to_glib_none().0,
@@ -53,6 +53,7 @@ impl<O: IsA<ChildProxy>> ChildProxyExtManual for O {
                 return Err(glib::BoolError("Child property not found"));
             }
 
+            let value = value.to_value();
             ffi::gst_child_proxy_set_property(
                 self.to_glib_none().0,
                 name.to_glib_none().0,