diff --git a/source/blender/blenfont/intern/blf_lang.c b/source/blender/blenfont/intern/blf_lang.c
index d5245073e59..87fbbc7b3e5 100644
--- a/source/blender/blenfont/intern/blf_lang.c
+++ b/source/blender/blenfont/intern/blf_lang.c
@@ -55,6 +55,7 @@
 
 #include "BLI_linklist.h"	/* linknode */
 #include "BLI_string.h"
+#include "BLI_utildefines.h"
 #include "BLI_path_util.h"
 
 #define DOMAIN_NAME "blender"