diff --git a/dlls/wininet/internet.c b/dlls/wininet/internet.c
index 11651e5566b..332e4f79816 100644
--- a/dlls/wininet/internet.c
+++ b/dlls/wininet/internet.c
@@ -1989,6 +1989,11 @@ static BOOL INET_QueryOptionHelper(BOOL bIsUnicode, HINTERNET hInternet, DWORD d
     TRACE("(%p, 0x%08lx, %p, %p)\n", hInternet, dwOption, lpBuffer, lpdwBufferLength);
 
     lpwhh = (LPWININETHANDLEHEADER) WININET_GetObject( hInternet );
+    if (!lpwhh)
+    {
+        SetLastError(ERROR_INVALID_PARAMETER);
+        return FALSE;
+    }
 
     switch (dwOption)
     {