diff --git a/src/commands/compiler.ts b/src/commands/compiler.ts
index 3fe58c6..1615f36 100644
--- a/src/commands/compiler.ts
+++ b/src/commands/compiler.ts
@@ -9,6 +9,9 @@ export interface GeneralOptions {
 }
 
 export interface Sw64TargetOptions {
+    /**
+     * Whether to enable "-msimd" to generate SIMD instructions.
+     */
     simd?: boolean;
 }