diff --git a/gtk/gtkapplication.c b/gtk/gtkapplication.c
index f0bba4312f..377f104174 100644
--- a/gtk/gtkapplication.c
+++ b/gtk/gtkapplication.c
@@ -29,6 +29,7 @@
 
 #include "gtkapplication.h"
 #include "gtkmarshalers.h"
+#include "gtkmain.h"
 #include "gtkwindow.h"
 
 #include <gdk/gdk.h>