diff --git a/packages/debug/src/browser/debug-session.tsx b/packages/debug/src/browser/debug-session.tsx
index 8f104f139399b..1c0bcde67e766 100644
--- a/packages/debug/src/browser/debug-session.tsx
+++ b/packages/debug/src/browser/debug-session.tsx
@@ -834,7 +834,7 @@ export class DebugSession implements CompositeTreeElement {
         }
         let debugSession: DebugSession | undefined = this;
         do {
-            debugSession = this.parentSession;
+            debugSession = debugSession.parentSession;
         } while (debugSession?.parentSession && debugSession.configuration.consoleMode === DebugConsoleMode.MergeWithParent);
         return debugSession;
     }