diff --git a/netwerk/protocol/http/nsHttpTransaction.cpp b/netwerk/protocol/http/nsHttpTransaction.cpp
index 161f8fcb377..6065b8f1560 100644
--- a/netwerk/protocol/http/nsHttpTransaction.cpp
+++ b/netwerk/protocol/http/nsHttpTransaction.cpp
@@ -1450,8 +1450,10 @@ nsHttpTransaction::HandleContentStart()
                 LOG(("Not Authoritative.\n"));
                 gHttpHandler->ConnMgr()->
                     ClearHostMapping(mConnInfo->GetHost(), mConnInfo->Port());
-                mForceRestart = true;
             }
+            // retry on a new connection - just in case
+            mCaps &= ~NS_HTTP_ALLOW_KEEPALIVE;
+            mForceRestart = true; // force restart has built in loop protection
             break;
         }