diff --git a/protocol/src/main/java/net/md_5/bungee/protocol/BadPacketException.java b/protocol/src/main/java/net/md_5/bungee/protocol/BadPacketException.java
new file mode 100644
index 00000000..523aeafc
--- /dev/null
+++ b/protocol/src/main/java/net/md_5/bungee/protocol/BadPacketException.java
@@ -0,0 +1,10 @@
+package net.md_5.bungee.protocol;
+
+public class BadPacketException extends RuntimeException
+{
+
+    public BadPacketException(String message)
+    {
+        super( message );
+    }
+}
diff --git a/protocol/src/main/java/net/md_5/bungee/protocol/Vanilla.java b/protocol/src/main/java/net/md_5/bungee/protocol/Vanilla.java
index 48dc78c0..a443dbc5 100644
--- a/protocol/src/main/java/net/md_5/bungee/protocol/Vanilla.java
+++ b/protocol/src/main/java/net/md_5/bungee/protocol/Vanilla.java
@@ -78,7 +78,7 @@ public class Vanilla implements Protocol
         DefinedPacket packet = read( packetId, buf, this );
         if ( buf.readerIndex() == start )
         {
-            throw new RuntimeException( "Unknown packet id " + packetId );
+            throw new BadPacketException( "Unknown packet id " + packetId );
         }
         return packet;
     }
diff --git a/proxy/src/main/java/net/md_5/bungee/netty/HandlerBoss.java b/proxy/src/main/java/net/md_5/bungee/netty/HandlerBoss.java
index 3160a501..d3a59eef 100644
--- a/proxy/src/main/java/net/md_5/bungee/netty/HandlerBoss.java
+++ b/proxy/src/main/java/net/md_5/bungee/netty/HandlerBoss.java
@@ -10,6 +10,7 @@ import net.md_5.bungee.api.ProxyServer;
 import net.md_5.bungee.connection.CancelSendSignal;
 import net.md_5.bungee.connection.InitialHandler;
 import net.md_5.bungee.connection.PingHandler;
+import net.md_5.bungee.protocol.BadPacketException;
 
 /**
  * This class is a primitive wrapper for {@link PacketHandler} instances tied to
@@ -95,6 +96,9 @@ public class HandlerBoss extends ChannelInboundHandlerAdapter
             if ( cause instanceof ReadTimeoutException )
             {
                 ProxyServer.getInstance().getLogger().log( Level.WARNING, handler + " - read timed out" );
+            } else if ( cause instanceof BadPacketException )
+            {
+                ProxyServer.getInstance().getLogger().log( Level.WARNING, handler + " - bad packet ID, are mods in use!?" );
             } else if ( cause instanceof IOException )
             {
                 ProxyServer.getInstance().getLogger().log( Level.WARNING, handler + " - IOException: " + cause.getMessage() );