diff --git a/utility/support.cpp b/utility/support.cpp
index 426896f350..736d4c7825 100644
--- a/utility/support.cpp
+++ b/utility/support.cpp
@@ -63,6 +63,7 @@
 
 // utility
 #include "fciconv.h"
+#include "fcintl.h"
 #include "log.h"
 
 #include "support.h"