diff --git a/.github/workflows/stale.yaml b/.github/workflows/stale.yaml
index 759bd84dd7..e1008e75e7 100644
--- a/.github/workflows/stale.yaml
+++ b/.github/workflows/stale.yaml
@@ -68,7 +68,7 @@ jobs:
                     repo: context.repo.repo,
                     issue_number: issue.number,
                     state: 'closed',
-                    state_reason: 'not planned'
+                    state_reason: 'not_planned'
                   });
                 }
               } else {