diff --git a/src/main/shell-session/local-shell-session/local-shell-session.ts b/src/main/shell-session/local-shell-session/local-shell-session.ts
index dd70aa0d24..301600bd71 100644
--- a/src/main/shell-session/local-shell-session/local-shell-session.ts
+++ b/src/main/shell-session/local-shell-session/local-shell-session.ts
@@ -30,6 +30,7 @@ export class LocalShellSession extends ShellSession {
   public async open() {
     let env = await this.getCachedShellEnv();
 
+    // extensions can modify the env
     env = this.shellEnvModify(this.cluster.id, env);
 
     const shell = env.PTYSHELL;