diff --git a/src/remote-container.ts b/src/remote-container.ts
index f19af23..78e63ac 100644
--- a/src/remote-container.ts
+++ b/src/remote-container.ts
@@ -118,7 +118,7 @@ export default class RemoteContainer {
 
         for await (const line of reader) {
           // host format: hostname:port
-          if (line.includes(`Host ${host}:${port}`)) {
+          if (line.includes(`Host ${host}-${port}`)) {
             // the container ssh info exists
             canAppendSSHConfig = false
             break;