diff --git a/packages/grpc-js-xds/src/xds-stream-state/eds-state.ts b/packages/grpc-js-xds/src/xds-stream-state/eds-state.ts
index 370cf750..9b7b9cd5 100644
--- a/packages/grpc-js-xds/src/xds-stream-state/eds-state.ts
+++ b/packages/grpc-js-xds/src/xds-stream-state/eds-state.ts
@@ -92,6 +92,11 @@ export class EdsState extends BaseXdsStreamState<ClusterLoadAssignment__Output>
         return false;
       }
     }
+    for (const priority of priorityTotalWeights.keys()) {
+      if (priority > 0 && !priorityTotalWeights.has(priority - 1)) {
+        return false;
+      }
+    }
     return true;
   }
 }
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