--- a/dom/network/UDPSocketParent.cpp
+++ b/dom/network/UDPSocketParent.cpp
@@ -347,17 +347,17 @@ UDPSocketParent::RecvOutgoingData(const 
     bool allowed;
     const InfallibleTArray<uint8_t>& data(aData.get_ArrayOfuint8_t());
     rv = mFilter->FilterPacket(&aAddr.get_NetAddr(), data.Elements(),
                                data.Length(), nsISocketFilter::SF_OUTGOING,
                                &allowed);
 
     // Sending unallowed data, kill content.
     if (NS_WARN_IF(NS_FAILED(rv)) || !allowed) {
-      return IPC_FAIL_NO_REASON(this);
+      return IPC_FAIL(this, "Content tried to send non STUN packet");
     }
   }
 
   switch(aData.type()) {
     case UDPData::TArrayOfuint8_t:
       Send(aData.get_ArrayOfuint8_t(), aAddr);
       break;
     case UDPData::TInputStreamParams: