diff --git a/src/inet/networklayer/ipv6/Ipv6.cc b/src/inet/networklayer/ipv6/Ipv6.cc
index 55d11f191be..49e4344c855 100644
--- a/src/inet/networklayer/ipv6/Ipv6.cc
+++ b/src/inet/networklayer/ipv6/Ipv6.cc
@@ -406,7 +406,10 @@ void Ipv6::datagramLocalOut(Packet *packet, const NetworkInterface *destIE, Ipv6
     const auto& ipv6Header = packet->peekAtFront<Ipv6Header>();
     // route packet
     if (destIE != nullptr)
-        fragmentPostRouting(packet, destIE, MacAddress::BROADCAST_ADDRESS, true); // FIXME what MAC address to use?
+        if(!ipv6Header->getDestAddress().isMulticast())
+            fragmentPostRouting(packet, destIE, MacAddress::BROADCAST_ADDRESS, true);
+        else
+            fragmentPostRouting(packet, destIE, ipv6Header->getDestAddress().mapToMulticastMacAddress(), true);
     else if (!ipv6Header->getDestAddress().isMulticast())
         routePacket(packet, destIE, nullptr, requestedNextHopAddress, true);
     else
@@ -605,7 +608,7 @@ void Ipv6::routeMulticastPacket(Packet *packet, const NetworkInterface *destIE,
     for (int i = 0; i < ift->getNumInterfaces(); i++) {
         NetworkInterface *ie = ift->getInterface(i);
         if (fromIE != ie && !ie->isLoopback())
-            fragmentPostRouting(packet->dup(), ie, MacAddress::BROADCAST_ADDRESS, fromHL);
+            fragmentPostRouting(packet->dup(), ie, ipv6Header->getDestAddress().mapToMulticastMacAddress(), fromHL);
     }
     delete packet;