diff --git a/usr.bin/passwd/passwd.c b/usr.bin/passwd/passwd.c
index 9d01454f5392..c66bcb0c3602 100644
--- a/usr.bin/passwd/passwd.c
+++ b/usr.bin/passwd/passwd.c
@@ -40,6 +40,7 @@ __FBSDID("$FreeBSD$");
 #include <err.h>
 #include <pwd.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <syslog.h>
 #include <unistd.h>