@@ -, +, @@ 
 GdkIsWaylandDisplay in non-unified builds
---
 widget/gtk/GtkCompositorWidget.h | 1 +
 1 file changed, 1 insertion(+)
--- a/widget/gtk/GtkCompositorWidget.h	
+++ a/widget/gtk/GtkCompositorWidget.h	
@@ -8,6 +8,7 @@ 
 
 #include "GLDefs.h"
 #include "mozilla/DataMutex.h"
+#include "mozilla/WidgetUtilsGtk.h"
 #include "mozilla/widget/CompositorWidget.h"
 #include "WindowSurfaceProvider.h"
 
--