diff --git a/src_main/containers/pivector.h b/src_main/containers/pivector.h
index 0e350da5..969abb14 100755
--- a/src_main/containers/pivector.h
+++ b/src_main/containers/pivector.h
@@ -26,6 +26,8 @@
 #define PIVECTOR_H
 
 #include "picontainers.h"
+#include <stdio.h>
+
 
 #if !defined(PIP_CONTAINERS_STL) || defined(DOXYGEN)