diff --git a/src/core/coap/coap_client.cpp b/src/core/coap/coap_client.cpp
index b6335185a..c871f5814 100644
--- a/src/core/coap/coap_client.cpp
+++ b/src/core/coap/coap_client.cpp
@@ -307,7 +307,8 @@ Message *Client::FindRelatedRequest(const Header &aResponseHeader, const Ip6::Me
     {
         aRequestMetadata.ReadFrom(*message);
 
-        if ((aRequestMetadata.mDestinationAddress == aMessageInfo.GetPeerAddr()) &&
+        if (((aRequestMetadata.mDestinationAddress == aMessageInfo.GetPeerAddr()) ||
+             aRequestMetadata.mDestinationAddress.IsMulticast()) &&
             (aRequestMetadata.mDestinationPort == aMessageInfo.GetPeerPort()))
         {
             assert(aRequestHeader.FromMessage(*message, true) == kThreadError_None);