diff --git a/src/Par.cpp b/src/Par.cpp
index 89dbe032..8b7a4045 100644
--- a/src/Par.cpp
+++ b/src/Par.cpp
@@ -11,6 +11,7 @@
 #include <stdexcept>
 #include <algorithm>
 #include <string.h>
+#include <stdio.h>
 
 #include "dds.h"
 #include "PBN.h"