fix(assign): Fix internal type signature

kofno · May 28, 2018 · a2bf999 · a2bf999
1 parent 18b258d
commit a2bf999
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/Just.ts b/src/Just.ts
@@ -31,7 +31,7 @@ export class Just<A> extends Maybe<A> {
     other: Maybe<B> | ((a: A) => Maybe<B>)
   ): Maybe<A & { [k in K]: B }> {
     const maybe = other instanceof Maybe ? other : other(this.value);
-    return maybe.map(b => ({
+    return maybe.map<A & { [k in K]: B }>(b => ({
       ...Object(this.value),
       [k.toString()]: b
     }));