diff --git a/girepository/gitypes.h b/girepository/gitypes.h
index 4df37900c..3d382c974 100644
--- a/girepository/gitypes.h
+++ b/girepository/gitypes.h
@@ -28,6 +28,8 @@
 #error "Only <girepository.h> can be included directly."
 #endif
 
+#include <glib.h>
+
 G_BEGIN_DECLS
 
 typedef struct _GIBaseInfoStub {