diff -up webkit-qtwebkit-23/Source/WTF/wtf/gobject/GRefPtr.h.me webkit-qtwebkit-23/Source/WTF/wtf/gobject/GRefPtr.h
--- webkit-qtwebkit-23/Source/WTF/wtf/gobject/GRefPtr.h.me	2021-09-16 10:00:33.214875944 +0200
+++ webkit-qtwebkit-23/Source/WTF/wtf/gobject/GRefPtr.h	2021-09-16 10:00:51.055293899 +0200
@@ -28,9 +28,7 @@
 #include <wtf/AlwaysInline.h>
 #include <wtf/RefPtr.h>
 #include <algorithm>
-
-extern "C" void g_object_unref(gpointer);
-extern "C" gpointer g_object_ref_sink(gpointer);
+#include <glib.h>
 
 namespace WTF {