diff --git a/tools/cltest.c b/tools/cltest.c
index 2766fcd23..250c93cc7 100644
--- a/tools/cltest.c
+++ b/tools/cltest.c
@@ -72,6 +72,7 @@ static bool send_message(const bdaddr_t *src, const bdaddr_t *dst,
 		return false;
 	}
 
+	close(fd);
 	return true;
 }