diff --git a/src/Protocol/PacketID.cpp b/src/Protocol/PacketID.cpp
index 6bb8379dd..f401f856e 100644
--- a/src/Protocol/PacketID.cpp
+++ b/src/Protocol/PacketID.cpp
@@ -79,8 +79,11 @@ UInt32 cProtocol_1_9_0::GetPacketId(eOutgoingPackets a_Packet)
 		case sendWindowOpen:            return 0x13;
 		case sendWindowProperty:        return 0x15;
 	}
-	LOGWARNING("Retrieving packet ID for unknown packet type %d!", a_Packet);
-	return 0;
+	ASSERT(!"Retrieving packet ID for unknown packet type");
+	#ifndef __clang__
+		LOGWARNING("Retrieving packet ID for unknown packet type %d!", a_Packet);
+		return 0;
+	#endif
 }