diff --git a/glib/gutf8.c b/glib/gutf8.c
index 7f6faedd6..98f470716 100644
--- a/glib/gutf8.c
+++ b/glib/gutf8.c
@@ -38,6 +38,7 @@
 
 #include "gconvert.h"
 #include "ghash.h"
+#include "gstrfuncs.h"
 #include "gtestutils.h"
 #include "gtypes.h"
 #include "gthread.h"