diff --git a/rfb/PixelFormat.cxx b/rfb/PixelFormat.cxx
index d20be93..8809fb5 100644
--- a/rfb/PixelFormat.cxx
+++ b/rfb/PixelFormat.cxx
@@ -20,6 +20,7 @@
 #include <rdr/InStream.h>
 #include <rdr/OutStream.h>
 #include <rfb/PixelFormat.h>
+#include <rfb/util.h>
 
 #ifdef _WIN32
 #define strcasecmp _stricmp