diff --git a/browser/components/about/AboutRedirector.cpp b/browser/components/about/AboutRedirector.cpp
index da2c9ed99c16..2da8a66f1dcd 100644
--- a/browser/components/about/AboutRedirector.cpp
+++ b/browser/components/about/AboutRedirector.cpp
@@ -37,6 +37,7 @@ static RedirEntry kRedirMap[] = {
 #ifdef MOZ_SAFE_BROWSING
   { "blocked", "chrome://browser/content/blockedSite.xhtml",
     nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |
+    nsIAboutModule::URI_CAN_LOAD_IN_CHILD |
     nsIAboutModule::ALLOW_SCRIPT |
     nsIAboutModule::HIDE_FROM_ABOUTABOUT },
 #endif