--- a/devtools/client/debugger/new/panel.js
+++ b/devtools/client/debugger/new/panel.js
@@ -24,17 +24,17 @@ DebuggerPanel.prototype = {
     const {
       actions,
       store,
       selectors,
       client
     } = await this.panelWin.Debugger.bootstrap({
       threadClient: this.toolbox.threadClient,
       tabTarget: this.toolbox.target,
-      debuggerClient: this.toolbox.target._client,
+      debuggerClient: this.toolbox.target.client,
       sourceMaps: this.toolbox.sourceMapService
     });
 
     this._actions = actions;
     this._store = store;
     this._selectors = selectors;
     this._client = client;
     this.isReady = true;