diff --git a/src/localtime.c b/src/localtime.c
index ed6ff2cd..2021325b 100644
--- a/src/localtime.c
+++ b/src/localtime.c
@@ -62,7 +62,7 @@ void nolocks_localtime(struct tm *tmp, time_t t, time_t tz, int dst) {
     const time_t secs_day = 3600*24;
 
     t -= tz;                            /* Adjust for timezone. */
-    t += 3600+dst;                      /* Adjust for daylight time. */
+    t += 3600*dst;                      /* Adjust for daylight time. */
     time_t days = t / secs_day;         /* Days passed since epoch. */
     time_t seconds = t % secs_day;      /* Remaining seconds. */