diff --git a/protocol/src/main/java/net/md_5/bungee/protocol/Protocol.java b/protocol/src/main/java/net/md_5/bungee/protocol/Protocol.java
index 9c8a7118..21f4a5d5 100644
--- a/protocol/src/main/java/net/md_5/bungee/protocol/Protocol.java
+++ b/protocol/src/main/java/net/md_5/bungee/protocol/Protocol.java
@@ -529,7 +529,7 @@ public enum Protocol
             {
                 throw new BadPacketException( "Unsupported protocol version " + version );
             }
-            if ( id > MAX_PACKET_ID )
+            if ( id > MAX_PACKET_ID || id < 0 )
             {
                 throw new BadPacketException( "Packet with id " + id + " outside of range" );
             }