1 files changed, 1 insertions, 0 deletions

diff --git a/bitncmp.c b/bitncmp.c
index 32b70a9..3986dc6 100644
--- a/bitncmp.c
+++ b/bitncmp.c
@@ -19,6 +19,7 @@
 
 #include <sys/types.h>
 #include <string.h>
+#include <stdlib.h>
 #include "bitncmp.h"
 
 /*