diff --git a/core/src/mindustry/core/NetClient.java b/core/src/mindustry/core/NetClient.java
index ce2498792a..e7f69c8eb4 100644
--- a/core/src/mindustry/core/NetClient.java
+++ b/core/src/mindustry/core/NetClient.java
@@ -260,33 +260,10 @@ public class NetClient implements ApplicationListener{
 
             //a command was sent, now get the output
             if(response.type != ResponseType.valid){
-                String text;
-
-                //send usage
-                if(response.type == ResponseType.manyArguments){
-                    text = "[scarlet]Too many arguments. Usage:[lightgray] " + response.command.text + "[gray] " + response.command.paramText;
-                }else if(response.type == ResponseType.fewArguments){
-                    text = "[scarlet]Too few arguments. Usage:[lightgray] " + response.command.text + "[gray] " + response.command.paramText;
-                }else{ //unknown command
-                    int minDst = 0;
-                    Command closest = null;
-
-                    for(Command command : netServer.clientCommands.getCommandList()){
-                        int dst = Strings.levenshtein(command.text, response.runCommand);
-                        if(dst < 3 && (closest == null || dst < minDst)){
-                            minDst = dst;
-                            closest = command;
-                        }
-                    }
-
-                    if(closest != null){
-                        text = "[scarlet]Unknown command. Did you mean \"[lightgray]" + closest.text + "[]\"?";
-                    }else{
-                        text = "[scarlet]Unknown command. Check [lightgray]/help[scarlet].";
-                    }
+                String text = netServer.invalidHandler.handle(player, response);
+                if(text != null){
+                    player.sendMessage(text);
                 }
-
-                player.sendMessage(text);
             }
         }
     }
diff --git a/core/src/mindustry/core/NetServer.java b/core/src/mindustry/core/NetServer.java
index 9a72f7ad51..8c8498c03f 100644
--- a/core/src/mindustry/core/NetServer.java
+++ b/core/src/mindustry/core/NetServer.java
@@ -67,6 +67,32 @@ public class NetServer implements ApplicationListener{
     /** Converts a message + NULLABLE player sender into a single string. Override for custom prefixes/suffixes. */
     public ChatFormatter chatFormatter = (player, message) -> player == null ? message : "[coral][[" + player.coloredName() + "[coral]]:[white] " + message;
 
+    /** Handles an incorrect command response. Returns text that will be sent to player. Override for customisation. */
+    public InvalidCommandHandler invalidHandler = (player, response) -> {
+        if(response.type == ResponseType.manyArguments){
+            return "[scarlet]Too many arguments. Usage:[lightgray] " + response.command.text + "[gray] " + response.command.paramText;
+        }else if(response.type == ResponseType.fewArguments){
+            return "[scarlet]Too few arguments. Usage:[lightgray] " + response.command.text + "[gray] " + response.command.paramText;
+        }else{ //unknown command
+            int minDst = 0;
+            Command closest = null;
+
+            for(Command command : netServer.clientCommands.getCommandList()){
+                int dst = Strings.levenshtein(command.text, response.runCommand);
+                if(dst < 3 && (closest == null || dst < minDst)){
+                    minDst = dst;
+                    closest = command;
+                }
+            }
+
+            if(closest != null){
+                return "[scarlet]Unknown command. Did you mean \"[lightgray]" + closest.text + "[]\"?";
+            }else{
+                return "[scarlet]Unknown command. Check [lightgray]/help[scarlet].";
+            }
+        }
+    };
+
     private boolean closing = false;
     private Interval timer = new Interval();
 
@@ -994,4 +1020,8 @@ public class NetServer implements ApplicationListener{
         /** @return text to be placed before player name */
         String format(@Nullable Player player, String message);
     }
+
+    public interface InvalidCommandHandler{
+        String handle(Player player, CommandResponse response);
+    }
 }