diff --git a/src/main.cpp b/src/main.cpp
index fc56122..2aaa915 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -74,7 +74,9 @@ void handle_command(String received_command)
     }
 
 #ifdef HELP
-    comPort->println(F("Type 'help' for a list of commands."));
+    comPort->print(F("Command not recognised: '"));
+    comPort->print(received_command);
+    comPort->println(F("', Type 'help' for a list of commands."));
 #else
     comPort->println(F("Invalid command"));
 #endif