diff --git a/dlls/shlwapi/url.c b/dlls/shlwapi/url.c
index 19083dc406f..d3dea24d4f4 100644
--- a/dlls/shlwapi/url.c
+++ b/dlls/shlwapi/url.c
@@ -2441,7 +2441,7 @@ HRESULT WINAPI UrlFixupW(LPCWSTR url, LPWSTR translatedUrl, DWORD maxChars)
     if (!url)
         return E_FAIL;
 
-    srcLen = lstrlenW(url);
+    srcLen = lstrlenW(url) + 1;
 
     /* For now just copy the URL directly */
     lstrcpynW(translatedUrl, url, (maxChars < srcLen) ? maxChars : srcLen);