diff --git a/test/unit/ntp_core.c b/test/unit/ntp_core.c
index ac8aec3..63b2d55 100644
--- a/test/unit/ntp_core.c
+++ b/test/unit/ntp_core.c
@@ -137,8 +137,8 @@ static void
 send_response(int interleaved, int authenticated, int allow_update, int valid_ts, int valid_auth)
 {
   NTP_Packet *req, *res;
+  uint32_t key_id = 0;
   int auth_len = 0;
-  uint32_t key_id;
 
   req = &req_buffer;
   res = &res_buffer;