diff --git a/dlls/uxtheme/msstyles.c b/dlls/uxtheme/msstyles.c
index 16cfbf5f076..e471c3cc0c0 100644
--- a/dlls/uxtheme/msstyles.c
+++ b/dlls/uxtheme/msstyles.c
@@ -188,6 +188,7 @@ HRESULT MSSTYLES_OpenThemeFile(LPCWSTR lpThemeFile, LPCWSTR pszColorName, LPCWST
     return S_OK;
 
 invalid_theme:
+    *tf = NULL;
     if(hTheme) FreeLibrary(hTheme);
     return hr;
 }