diff --git a/src/core/meshcop/joiner_router.cpp b/src/core/meshcop/joiner_router.cpp
index f74ff65a4..08e9158a5 100644
--- a/src/core/meshcop/joiner_router.cpp
+++ b/src/core/meshcop/joiner_router.cpp
@@ -217,6 +217,7 @@ void JoinerRouter::HandleUdpReceive(Message &aMessage, const Ip6::MessageInfo &a
         SuccessOrExit(error = message->Append(tmp, length));
     }
 
+    messageInfo.SetSockAddr(mNetif.GetMle().GetMeshLocal16());
     messageInfo.SetPeerAddr(mNetif.GetMle().GetMeshLocal16());
     messageInfo.GetPeerAddr().mFields.m16[7] = HostSwap16(borderAgentRloc);
     messageInfo.SetPeerPort(kCoapUdpPort);