diff --git a/gdk/x11/gdkglcontext-x11.c b/gdk/x11/gdkglcontext-x11.c
index 1464d9aa95..3377f6966e 100644
--- a/gdk/x11/gdkglcontext-x11.c
+++ b/gdk/x11/gdkglcontext-x11.c
@@ -368,7 +368,7 @@ gdk_x11_gl_context_texture_from_surface (GdkGLContext *context,
   if (glx_pixmap == NULL)
     return FALSE;
 
-  window = gdk_gl_context_get_window (gdk_gl_context_get_current ());
+  window = gdk_gl_context_get_window (gdk_gl_context_get_current ())->impl_window;
   window_scale = gdk_window_get_scale_factor (window);
   window_height = gdk_window_get_height (window);