diff --git a/typings/xterm.d.ts b/typings/xterm.d.ts
index dd08b55e..32c8b0a0 100644
--- a/typings/xterm.d.ts
+++ b/typings/xterm.d.ts
@@ -547,6 +547,12 @@ declare module 'xterm' {
      * @param value The option value.
      */
     setOption(key: 'theme', value: ITheme): void;
+    /**
+     * Sets an option on the terminal.
+     * @param key The option key.
+     * @param value The option value.
+     */
+    setOption(key: 'cols' | 'rows', value: number): void;
     /**
      * Sets an option on the terminal.
      * @param key The option key.