diff --git a/backend/windmill-api/src/jobs.rs b/backend/windmill-api/src/jobs.rs
index fb26b157b9..0cc4db533c 100644
--- a/backend/windmill-api/src/jobs.rs
+++ b/backend/windmill-api/src/jobs.rs
@@ -3747,6 +3747,7 @@ fn list_completed_jobs_query(
 
     if let Some(label) = &lq.label {
         sqlb.and_where("result->>'wm_label' = ?".bind(label));
+        sqlb.and_where("result ? 'wm_label'");
     }
 
     if lq.is_not_schedule.unwrap_or(false) {