Index: dll/win32/wininet/http.c
===================================================================
--- dll/win32/wininet/http.c	(revision 72017)
+++ dll/win32/wininet/http.c	(working copy)
@@ -1794,7 +1794,10 @@
                                     proxy, strlenW(szHttp), szHttp, strlenW(szHttp))) {
         WCHAR *proxy_url = heap_alloc(strlenW(proxy)*sizeof(WCHAR) + sizeof(szHttp));
         if(!proxy_url)
+        {
+            heap_free(proxy);
             return FALSE;
+        }
         strcpyW(proxy_url, szHttp);
         strcatW(proxy_url, proxy);
         heap_free(proxy);