diff --git a/reactos/dll/win32/kernel32/misc/time.c b/reactos/dll/win32/kernel32/misc/time.c
index 391fbe0235a..92aee600c50 100644
--- a/reactos/dll/win32/kernel32/misc/time.c
+++ b/reactos/dll/win32/kernel32/misc/time.c
@@ -141,6 +141,8 @@ static DWORD TIME_CompTimeZoneID ( const TIME_ZONE_INFORMATION *pTZinfo,
     SYSTEMTIME SysTime;
     FILETIME ftTemp;
 
+    ZeroMemory (&SysTime, sizeof (SysTime));
+
     if (pTZinfo->DaylightDate.wMonth != 0)
     {
         /* if year is 0 then date is in day-of-week format, otherwise