diff --git a/src/wayland/server/region_interface.h b/src/wayland/server/region_interface.h
index cc98bb2860..24dbc395d4 100644
--- a/src/wayland/server/region_interface.h
+++ b/src/wayland/server/region_interface.h
@@ -73,5 +73,6 @@ private:
 
 }
 }
+Q_DECLARE_METATYPE(KWayland::Server::RegionInterface*)
 
 #endif
diff --git a/src/wayland/surface_interface.h b/src/wayland/surface_interface.h
index 8b5ecf1564..caf10aede7 100644
--- a/src/wayland/surface_interface.h
+++ b/src/wayland/surface_interface.h
@@ -217,4 +217,6 @@ private:
 }
 }
 
+Q_DECLARE_METATYPE(KWayland::Server::SurfaceInterface*)
+
 #endif