diff --git a/components/about/AboutRedirector.cpp b/components/about/AboutRedirector.cpp
index e41882fdad..d060c99dbe 100644
--- a/components/about/AboutRedirector.cpp
+++ b/components/about/AboutRedirector.cpp
@@ -41,7 +41,7 @@ namespace dot {
             },
             {
                 "certerror", 
-                "chrome://global/content/aboutNetError.html",
+                "chrome://global/content/aboutNetError.xhtml",
                 nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |
                     nsIAboutModule::URI_CAN_LOAD_IN_CHILD | nsIAboutModule::ALLOW_SCRIPT |
                     nsIAboutModule::HIDE_FROM_ABOUTABOUT