diff --git a/dlls/wininet/utility.c b/dlls/wininet/utility.c
index 352b2609c17..25972688a1e 100644
--- a/dlls/wininet/utility.c
+++ b/dlls/wininet/utility.c
@@ -71,6 +71,7 @@ time_t ConvertTimeString(LPCWSTR asctime)
     tmpChar[22]='\0';
     tmpChar[25]='\0';
 
+    memset( &t, 0, sizeof(t) );
     t.tm_year = atoiW(tmpChar+12) - 1900;
     t.tm_mday = atoiW(tmpChar+5);
     t.tm_hour = atoiW(tmpChar+17);