diff --git a/TypedFastBitSet.d.ts b/TypedFastBitSet.d.ts
index cedd828..90c29e2 100644
--- a/TypedFastBitSet.d.ts
+++ b/TypedFastBitSet.d.ts
@@ -57,9 +57,12 @@ declare class TypedFastBitSet {
     /** If the value was not in the set, add it, otherwise remove it (flip bit at `index`) */
     flip(index: number): void;
 
-    /** Return an array with the set bit locations (values) */
+    /** Call a function with the set bit locations (values) */
     forEach(fnc: (index: number) => void): void;
 
+    /** Iterate over the set bit locations */
+    *[Symbol.iterator](): IterableIterator[number];
+
     /** fast function to compute the Hamming weight of a 32-bit unsigned integer */
     hammingWeight(v: number): number;