diff --git a/generator/interfaces.ts b/generator/interfaces.ts
index 5f3e0eeaa..2d1016b74 100644
--- a/generator/interfaces.ts
+++ b/generator/interfaces.ts
@@ -57,4 +57,3 @@ export interface JujuRequest {
 
 export type CallbackError = Error | null;
 export type Callback<T> = (error: CallbackError, value?: T) => void;
-// check that we need to put null in front if there is value