diff --git a/services/commands-service.ts b/services/commands-service.ts
index 6314e23f..a9bbdc70 100644
--- a/services/commands-service.ts
+++ b/services/commands-service.ts
@@ -253,7 +253,7 @@ export class CommandsService implements ICommandsService {
 					// Remove the matched parameter from unverifiedAllowedParams collection, so it will not be used to verify another argument.
 					unverifiedAllowedParams.splice(index, 1);
 				} else {
-					this.$errors.fail("The parameter %s is not valid for this command.", parameter);
+					this.$errors.fail(`The parameter ${argument} is not valid for this command.`);
 				}
 			}
 		}