diff --git a/tabby-ssh/src/polyfills.ts b/tabby-ssh/src/polyfills.ts
index da48c261..06235b1f 100644
--- a/tabby-ssh/src/polyfills.ts
+++ b/tabby-ssh/src/polyfills.ts
@@ -7,6 +7,6 @@ nodeCrypto.createDiffieHellman = browserDH.createDiffieHellman
 // Declare function missing from @types
 declare module 'ssh2' {
     interface Client {
-        setNoDelay(enable?: boolean): this
+        setNoDelay: (enable?: boolean) => this
     }
-}
\ No newline at end of file
+}