diff --git a/std/assembly/fixedarray.ts b/std/assembly/fixedarray.ts
index b0487f9a..7bf1b714 100644
--- a/std/assembly/fixedarray.ts
+++ b/std/assembly/fixedarray.ts
@@ -36,7 +36,7 @@ export class FixedArray<T> {
 
   @operator("[]=") private __set(index: i32, value: T): void {
     if (<u32>index >= <u32>this.length) throw new RangeError(E_INDEXOUTOFRANGE);
-    return this.__unchecked_set(index, value);
+    this.__unchecked_set(index, value);
   }
 
   @operator("{}") private __unchecked_get(index: i32): T {