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-rw-r--r--cutils.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/cutils.c b/cutils.c
index 8ef648f4b9..8edd8fa13c 100644
--- a/cutils.c
+++ b/cutils.c
@@ -115,7 +115,7 @@ time_t mktimegm(struct tm *tm)
         m += 12;
         y--;
     }
-    t = 86400 * (d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 + 
+    t = 86400ULL * (d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 + 
                  y / 400 - 719469);
     t += 3600 * tm->tm_hour + 60 * tm->tm_min + tm->tm_sec;
     return t;