diff --git a/common/rfb/CMsgReaderV3.cxx b/common/rfb/CMsgReaderV3.cxx
index d0cfc89..ae5f455 100644
--- a/common/rfb/CMsgReaderV3.cxx
+++ b/common/rfb/CMsgReaderV3.cxx
@@ -22,6 +22,7 @@
 #include <rfb/CMsgReaderV3.h>
 #include <rfb/CMsgHandler.h>
 #include <rfb/util.h>
+#include <stdio.h>
 
 using namespace rfb;