diff --git a/src/common/xsprintf.h b/src/common/xsprintf.h
index bf48ca083..6981842fd 100644
--- a/src/common/xsprintf.h
+++ b/src/common/xsprintf.h
@@ -38,6 +38,7 @@
 
 
 
+#include <stdlib.h>
 #include <stdarg.h>
 
 #include "attrib.h"