diff --git a/actions/github/pull-request/add-label-based-on-branch-name/action.yaml b/actions/github/pull-request/add-label-based-on-branch-name/action.yaml
index ea2346c..e753ad1 100644
--- a/actions/github/pull-request/add-label-based-on-branch-name/action.yaml
+++ b/actions/github/pull-request/add-label-based-on-branch-name/action.yaml
@@ -35,7 +35,7 @@ runs:
 
           if (context.eventName == 'workflow_run') {
             core.exportVariable("PULL_REQUEST_NUMBER", context.payload.workflow_run.pull_requests[0].number);
-            core.exportVariable("PULL_REQUEST_NUMBER", context.payload.workflow_run.pull_requests[0].head.ref);
+            core.exportVariable("PULL_REQUEST_BRANCH_NAME", context.payload.workflow_run.pull_requests[0].head.ref);
 
             return;
           }