1 files changed, 3 insertions, 0 deletions
diff --git a/time/win32/time.c b/time/win32/time.c
index 02b272360..ac75b7b6f 100644
--- a/time/win32/time.c
+++ b/time/win32/time.c
@@ -54,6 +54,9 @@ static void SystemTimeToAprExpTime(apr_time_exp_t *xt, SYSTEMTIME *tm)
     static const int dayoffset[12] =
     {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
 
+    if (tm->wMonth < 1 || tm->wMonth > 12)
+        return;
+
     /* Note; the caller is responsible for filling in detailed tm_usec,
      * tm_gmtoff and tm_isdst data when applicable.
      */