--- a/contrib/ldapc++/src/SaslInteractionHandler.cpp
+++ b/contrib/ldapc++/src/SaslInteractionHandler.cpp
@@ -13,6 +13,7 @@
 #include <termios.h>
 #endif
 
+#include <stdio.h>
 #include <string.h>
 #include "SaslInteractionHandler.h"
 #include "SaslInteraction.h"