diff --git a/gtk/gtksecurememoryprivate.h b/gtk/gtksecurememoryprivate.h
index 0209d4fc11..bf9c5f3803 100644
--- a/gtk/gtksecurememoryprivate.h
+++ b/gtk/gtksecurememoryprivate.h
@@ -25,6 +25,7 @@
 #pragma once
 
 #include <stdlib.h>
+#include <glib.h>
 
 /*
  * Main functionality