--- a/netwerk/base/LoadInfo.cpp
+++ b/netwerk/base/LoadInfo.cpp
@@ -413,16 +413,17 @@ LoadInfo::CloneWithNewSecFlags(nsSecurit
 already_AddRefed<nsILoadInfo>
 LoadInfo::CloneForNewRequest() const
 {
   RefPtr<LoadInfo> copy(new LoadInfo(*this));
   copy->mEnforceSecurity = false;
   copy->mInitialSecurityCheckDone = false;
   copy->mRedirectChainIncludingInternalRedirects.Clear();
   copy->mRedirectChain.Clear();
+  copy->mResultPrincipalURI = nullptr;
   return copy.forget();
 }
 
 NS_IMETHODIMP
 LoadInfo::GetLoadingPrincipal(nsIPrincipal** aLoadingPrincipal)
 {
   NS_IF_ADDREF(*aLoadingPrincipal = mLoadingPrincipal);
   return NS_OK;