diff --git a/src/mac/carbon/fontutil.cpp b/src/mac/carbon/fontutil.cpp
index 2947ff8d0e..0cc43c8953 100644
--- a/src/mac/carbon/fontutil.cpp
+++ b/src/mac/carbon/fontutil.cpp
@@ -17,6 +17,7 @@
 
 #ifndef WX_PRECOMP
     #include "wx/string.h"
+    #include "wx/wxcrtvararg.h"
     #include "wx/log.h"
     #include "wx/intl.h"
 #endif