diff --git a/src/backend/agent.js b/src/backend/agent.js
index 39a1f38381..dee69506cb 100644
--- a/src/backend/agent.js
+++ b/src/backend/agent.js
@@ -29,11 +29,6 @@ const debug = (methodName, ...args) => {
   }
 };
 
-type OperationsParams = {|
-  operations: Uint32Array,
-  rendererID: number,
-|};
-
 type InspectSelectParams = {|
   id: number,
   rendererID: number,
@@ -505,7 +500,7 @@ export default class Agent extends EventEmitter {
     }
   };
 
-  onHookOperations = ({ operations, rendererID }: OperationsParams) => {
+  onHookOperations = (operations: Uint32Array) => {
     if (__DEBUG__) {
       debug('onHookOperations', operations);
     }
@@ -533,6 +528,7 @@ export default class Agent extends EventEmitter {
     this._bridge.send('operations', operations);
 
     if (this._persistedSelection !== null) {
+      const rendererID = operations[0];
       if (this._persistedSelection.rendererID === rendererID) {
         // Check if we can select a deeper match for the persisted selection.
         const renderer = this._rendererInterfaces[rendererID];
diff --git a/src/backend/renderer.js b/src/backend/renderer.js
index 9d751756ae..f83dfcc6f9 100644
--- a/src/backend/renderer.js
+++ b/src/backend/renderer.js
@@ -686,10 +686,7 @@ export function attach(
       pendingOperationsQueue.push(ops);
     } else {
       // If we've already connected to the frontend, just pass the operations through.
-      hook.emit('operations', {
-        operations: ops,
-        rendererID,
-      });
+      hook.emit('operations', ops);
     }
 
     pendingOperations.length = 0;
@@ -1155,10 +1152,7 @@ export function attach(
       // We may have already queued up some operations before the frontend connected
       // If so, let the frontend know about them.
       localPendingOperationsQueue.forEach(ops => {
-        hook.emit('operations', {
-          operations: ops,
-          rendererID,
-        });
+        hook.emit('operations', ops);
       });
     } else {
       // Before the traversals, remember to start tracking