diff --git a/src/core/net/ip6.cpp b/src/core/net/ip6.cpp
index e340b1f58..f9cbc3409 100644
--- a/src/core/net/ip6.cpp
+++ b/src/core/net/ip6.cpp
@@ -1138,6 +1138,7 @@ start:
     messageInfo.SetPeerAddr(header.GetSource());
     messageInfo.SetSockAddr(header.GetDestination());
     messageInfo.SetHopLimit(header.GetHopLimit());
+    messageInfo.SetEcn(header.GetEcn());
     messageInfo.SetLinkInfo(aLinkMessageInfo);
 
     // determine destination of packet