diff --git a/sources/generated/Gst/Promise.cs b/sources/generated/Gst/Promise.cs
index c41e7f8f6a..857402a57f 100644
--- a/sources/generated/Gst/Promise.cs
+++ b/sources/generated/Gst/Promise.cs
@@ -75,9 +75,18 @@ namespace Gst {
 		[DllImport("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
 		static extern IntPtr gst_promise_new_with_change_func(GstSharp.PromiseChangeFuncNative func, IntPtr user_data, GLib.DestroyNotify notify);
 
-		public Promise (Gst.PromiseChangeFunc func, IntPtr user_data, GLib.DestroyNotify notify) 
+		public Promise (Gst.PromiseChangeFunc func) 
 		{
 			GstSharp.PromiseChangeFuncWrapper func_wrapper = new GstSharp.PromiseChangeFuncWrapper (func);
+			IntPtr user_data;
+			GLib.DestroyNotify notify;
+			if (func == null) {
+				user_data = IntPtr.Zero;
+				notify = null;
+			} else {
+				user_data = (IntPtr) GCHandle.Alloc (func_wrapper);
+				notify = GLib.DestroyHelper.NotifyHandler;
+			}
 			Raw = gst_promise_new_with_change_func(func_wrapper.NativeDelegate, user_data, notify);
 		}
 
diff --git a/sources/generated/gstreamer-sharp-api.xml b/sources/generated/gstreamer-sharp-api.xml
index 259e4ac6e9..6195792165 100644
--- a/sources/generated/gstreamer-sharp-api.xml
+++ b/sources/generated/gstreamer-sharp-api.xml
@@ -9060,7 +9060,7 @@
       <constructor cname="gst_promise_new" disable_void_ctor="" version="1.14" />
       <constructor cname="gst_promise_new_with_change_func" version="1.14">
         <parameters>
-          <parameter name="func" type="GstPromiseChangeFunc" />
+          <parameter name="func" type="GstPromiseChangeFunc" scope="notified" closure="1" destroy="2" />
           <parameter name="user_data" type="gpointer" />
           <parameter name="notify" type="GDestroyNotify" />
         </parameters>
diff --git a/sources/gstreamer-sharp.metadata b/sources/gstreamer-sharp.metadata
index e25957a7e0..fa74b36ffa 100644
--- a/sources/gstreamer-sharp.metadata
+++ b/sources/gstreamer-sharp.metadata
@@ -39,6 +39,10 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 
 	<!-- GstPromise fixes -->
 	<attr path="/api/namespace/boxed[@cname='GstPromise']/method[@cname='gst_promise_get_reply']" name="name">RetrieveReply</attr>
+	<attr path="/api/namespace/boxed[@cname='GstPromise']/constructor[@cname='gst_promise_new_with_change_func']/*/*[@name='func']" name="scope">notified</attr>
+	<attr path="/api/namespace/boxed[@cname='GstPromise']/constructor[@cname='gst_promise_new_with_change_func']/*/*[@name='func']" name="closure">1</attr>
+	<attr path="/api/namespace/boxed[@cname='GstPromise']/constructor[@cname='gst_promise_new_with_change_func']/*/*[@name='func']" name="destroy">2</attr>
+
 
 	<!-- GstRTSPMessage fixes -->
 	<attr path="/api/namespace/boxed[@cname='GstRTSPMessage']/method[@cname='gst_rtsp_message_get_body']" name="hidden">true</attr>