diff --git a/src/vs/workbench/contrib/chat/browser/chatSessions/chatSessions.contribution.ts b/src/vs/workbench/contrib/chat/browser/chatSessions/chatSessions.contribution.ts
index f98c6d170b6..171d6bc3529 100644
--- a/src/vs/workbench/contrib/chat/browser/chatSessions/chatSessions.contribution.ts
+++ b/src/vs/workbench/contrib/chat/browser/chatSessions/chatSessions.contribution.ts
@@ -1213,8 +1213,9 @@ export class ChatSessionsService extends Disposable implements IChatSessionsServ
 	}
 
 	public sessionSupportsFork(sessionResource: URI): boolean {
-		const resolved = this._resolveResource(sessionResource);
-		const session = this._sessions.get(resolved);
+		const session = this._sessions.get(sessionResource)
+			// Try to resolve in case an alias was used
+			?? this._sessions.get(this._resolveResource(sessionResource));
 		return !!session?.session.forkSession;
 	}