diff --git a/dlls/shlwapi/url.c b/dlls/shlwapi/url.c
index 03941a9..d2bf779 100644
--- a/dlls/shlwapi/url.c
+++ b/dlls/shlwapi/url.c
@@ -1155,7 +1155,7 @@ HRESULT WINAPI UrlUnescapeA(
     TRACE("(%s, %p, %p, 0x%08x)\n", debugstr_a(pszUrl), pszUnescaped,
 	  pcchUnescaped, dwFlags);
 
-    if(!pszUrl || (!pszUnescaped && !(dwFlags & URL_UNESCAPE_INPLACE)) || !pcchUnescaped)
+    if(!pszUrl || (!pszUnescaped && !(dwFlags & URL_UNESCAPE_INPLACE)) || (!pcchUnescaped && !(dwFlags & URL_UNESCAPE_INPLACE)))
 	return E_INVALIDARG;
 
     if(dwFlags & URL_UNESCAPE_INPLACE)
@@ -1222,7 +1222,7 @@ HRESULT WINAPI UrlUnescapeW(
     TRACE("(%s, %p, %p, 0x%08x)\n", debugstr_w(pszUrl), pszUnescaped,
 	  pcchUnescaped, dwFlags);
 
-    if(!pszUrl || (!pszUnescaped && !(dwFlags & URL_UNESCAPE_INPLACE))|| !pcchUnescaped)
+    if(!pszUrl || (!pszUnescaped && !(dwFlags & URL_UNESCAPE_INPLACE)) || (!pcchUnescaped && !(dwFlags & URL_UNESCAPE_INPLACE)))
 	return E_INVALIDARG;
 
     if(dwFlags & URL_UNESCAPE_INPLACE)