diff --git a/src/ctbin/ctbin.cpp b/src/ctbin/ctbin.cpp
index 3de0bd9..f10a303 100644
--- a/src/ctbin/ctbin.cpp
+++ b/src/ctbin/ctbin.cpp
@@ -20,7 +20,7 @@
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
-#include <stdio.h>
+#include <cstdio>
 #include "ctbin.hpp"
 #include "GTools.hpp"