diff --git a/tabby-ssh/src/session/ssh.ts b/tabby-ssh/src/session/ssh.ts
index 2494a34a0..846aacf35 100644
--- a/tabby-ssh/src/session/ssh.ts
+++ b/tabby-ssh/src/session/ssh.ts
@@ -426,7 +426,7 @@ export class SSHSession {
                     key: this.profile.options.algorithms[SSHAlgorithmType.HOSTKEY].filter(x => supportedAlgorithms[SSHAlgorithmType.HOSTKEY].includes(x)),
                     compression: this.profile.options.algorithms[SSHAlgorithmType.COMPRESSION].filter(x => supportedAlgorithms[SSHAlgorithmType.COMPRESSION].includes(x)),
                 },
-                keepaliveIntervalSeconds: Math.round(this.profile.options.keepaliveInterval / 1000),
+                keepaliveIntervalSeconds: this.profile.options.keepaliveInterval ? Math.round(this.profile.options.keepaliveInterval / 1000) : undefined,
                 keepaliveCountMax: this.profile.options.keepaliveCountMax,
                 connectionTimeoutSeconds: this.profile.options.readyTimeout ? Math.round(this.profile.options.readyTimeout / 1000) : undefined,
             },