diff --git a/src/stratifier.c b/src/stratifier.c
index 91499cff..1e7a11f8 100644
--- a/src/stratifier.c
+++ b/src/stratifier.c
@@ -392,14 +392,10 @@ static void purge_share_hashtable(uint64_t wb_id)
 /* This message will be sent to the database once it's hooked in */
 static void send_workinfo(ckpool_t *ckp, workbase_t *wb)
 {
-	char *coinb1a, cdhex[20];
-	uint64_t createdate;
+	char *coinb1a, *cdhex;
 	json_t *val;
 
-	createdate = wb->gentime.tv_sec;
-	createdate *= 1000000000ull;
-	createdate += wb->gentime.tv_nsec;
-	sprintf(cdhex, "%016lx", createdate);
+	ASPRINTF(&cdhex, "%lu,%lu", wb->gentime.tv_sec, wb->gentime.tv_nsec);
 	coinb1a = bin2hex(wb->coinb1a, wb->coinb1alen);
 
 	val = json_pack("{ss,si,ss,ss,ss,ss,ss,ss,ss,ss,ss,ss}",
@@ -416,6 +412,7 @@ static void send_workinfo(ckpool_t *ckp, workbase_t *wb)
 			"createcode", __func__,
 			"createinet", "127.0.0.1");
 	free(coinb1a);
+	free(cdhex);
 	json_decref(val);
 }