diff --git a/strdup.c b/strdup.c
index 81265cd8b..b7376bec0 100644
--- a/strdup.c
+++ b/strdup.c
@@ -38,6 +38,7 @@ static char rcsid[] = "$Id$";
 
 #include "config.h"
 
+#include <stdio.h>
 #ifdef STDC_HEADERS
 #include <stdlib.h>
 #endif /* STDC_HEADERS */