diff --git a/dlls/wininet/tests/http.c b/dlls/wininet/tests/http.c
index acbaf2e5f79..c4db9967b62 100644
--- a/dlls/wininet/tests/http.c
+++ b/dlls/wininet/tests/http.c
@@ -2945,7 +2945,7 @@ static void test_cert_struct(HINTERNET req)
         "test.winehq.org\r\n"
         "webmaster@winehq.org";
 
-    memset(&info, 0x5, sizeof(&info));
+    memset(&info, 0x5, sizeof(info));
 
     size = sizeof(info);
     res = InternetQueryOption(req, INTERNET_OPTION_SECURITY_CERTIFICATE_STRUCT, &info, &size);