diff --git a/src/main.ts b/src/main.ts
index c1574d0..d94c982 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -4,7 +4,7 @@ import {wait} from './wait'
 async function run(): Promise<void> {
   try {
     const ms: string = core.getInput('milliseconds')
-    core.debug(`Waiting ${ms} milliseconds ...`) // debug is only output if you set the secret `ACTIONS_RUNNER_DEBUG` to true
+    core.debug(`Waiting ${ms} milliseconds ...`) // debug is only output if you set the secret `ACTIONS_STEP_DEBUG` to true
 
     core.debug(new Date().toTimeString())
     await wait(parseInt(ms, 10))