diff --git a/api/@ohos.process.d.ts b/api/@ohos.process.d.ts
index 02b7e123eadc87d0134c66a73260165ee024263e..775f0974c27a1210a98f41720d78d9fc336b1521 100644
--- a/api/@ohos.process.d.ts
+++ b/api/@ohos.process.d.ts
@@ -263,7 +263,7 @@ declare namespace process {
     * @return Return a child process object.
     */
     function runCmd(command: string,
-        options?: { timeout : number, killSignal : number | string, maxBuffer : number }): ChildProcess;
+        options?: { timeout?: number, killSignal?: number | string, maxBuffer?: number }): ChildProcess;
 
     /**
     * Abort current process