diff --git a/src/interfaces/libpq/fe-trace.c b/src/interfaces/libpq/fe-trace.c
index 9a4595f5c8..a16cb4b453 100644
--- a/src/interfaces/libpq/fe-trace.c
+++ b/src/interfaces/libpq/fe-trace.c
@@ -80,11 +80,13 @@ static void
 pqTraceFormatTimestamp(char *timestr, size_t ts_len)
 {
 	struct timeval tval;
+	time_t now;
 
 	gettimeofday(&tval, NULL);
+	now = tval.tv_sec;
 	strftime(timestr, ts_len,
 			 "%Y-%m-%d %H:%M:%S",
-			 localtime(&tval.tv_sec));
+			 localtime(&now));
 	/* append microseconds */
 	snprintf(timestr + strlen(timestr), ts_len - strlen(timestr),
 			 ".%06u", (unsigned int) (tval.tv_usec));