diff --git a/jm2cv.cpp b/jm2cv.cpp
index c97e2db..0902179 100644
--- a/jm2cv.cpp
+++ b/jm2cv.cpp
@@ -1,6 +1,7 @@
 #include <iostream>
 #include <cstring>
 #include <csignal>
+#include <cstdio>
 
 #include "cvout.h"
 #include "cvin.h"