diff --git a/sc2/src/sc2code/libs/strings/unicode.c b/sc2/src/sc2code/libs/strings/unicode.c
index df17fe7f2..8006607a9 100644
--- a/sc2/src/sc2code/libs/strings/unicode.c
+++ b/sc2/src/sc2code/libs/strings/unicode.c
@@ -14,6 +14,8 @@
  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
+#include "port.h"
+
 #include <stddef.h>
 #include <stdio.h>