diff --git a/cmd/fwtablectl/firmware.go b/cmd/fwtablectl/firmware.go
index e321afc..cecca1c 100644
--- a/cmd/fwtablectl/firmware.go
+++ b/cmd/fwtablectl/firmware.go
@@ -34,6 +34,10 @@ func firmware(args []string) {
 			usage()
 		}
 		firmwareRemove(args[1:])
+	default:
+		fmt.Println("Invalid firmware command:", args[0])
+		usage()
+
 	}
 }
 
diff --git a/cmd/fwtablectl/part.go b/cmd/fwtablectl/part.go
index da7c446..b6878f6 100644
--- a/cmd/fwtablectl/part.go
+++ b/cmd/fwtablectl/part.go
@@ -14,6 +14,9 @@ func part(args []string) {
 			usage()
 		}
 		partRemove(args[1:])
+	default:
+		fmt.Println("Invalid parts command:", args[0])
+		usage()
 	}
 }