diff --git a/src/HTMLRenderer/text.cc b/src/HTMLRenderer/text.cc
index 84b0c7f..9b46c3b 100644
--- a/src/HTMLRenderer/text.cc
+++ b/src/HTMLRenderer/text.cc
@@ -413,7 +413,10 @@ void HTMLRenderer::embed_font(const string & filepath, GfxFont * font, FontInfo
     if(param->external_hint_tool != "")
     {
         rename(fn.c_str(), tmp_fn.c_str());
-        system((char*)str_fmt("%s %s %s", param->external_hint_tool.c_str(), tmp_fn.c_str(), fn.c_str()));
+        if(system((char*)str_fmt("%s %s %s", param->external_hint_tool.c_str(), tmp_fn.c_str(), fn.c_str())) != 0)
+        {
+            rename(tmp_fn.c_str(), fn.c_str());
+        }
     }
 
     /*