diff --git a/terminus-serial/src/api.ts b/terminus-serial/src/api.ts
index 4a38d516..62ba1ebf 100644
--- a/terminus-serial/src/api.ts
+++ b/terminus-serial/src/api.ts
@@ -131,6 +131,10 @@ export class SerialSession extends BaseSession {
         this.kill('TERM')
     }
 
+    supportsWorkingDirectory (): boolean {
+        return false
+    }
+
     async getWorkingDirectory (): Promise<string|null> {
         return null
     }