diff --git a/types/ramda/index.d.ts b/types/ramda/index.d.ts
index bcc5b732b0..5a8ea8f332 100644
--- a/types/ramda/index.d.ts
+++ b/types/ramda/index.d.ts
@@ -1833,8 +1833,8 @@ declare namespace R {
          * to stop iteration or an array of length 2 containing the value to add to the resulting
          * list and the seed to be used in the next call to the iterator function.
          */
-        unfold<T, TResult>(fn: (seed: T) => TResult[] | boolean, seed: T): TResult[];
-        unfold<T, TResult>(fn: (seed: T) => TResult[] | boolean): (seed: T) => TResult[];
+        unfold<T, TResult>(fn: (seed: T) => [TResult, T] | false, seed: T): TResult[];
+        unfold<T, TResult>(fn: (seed: T) => [TResult, T] | false): (seed: T) => TResult[];
 
         /**
          * Combines two lists into a set (i.e. no duplicates) composed of the
diff --git a/types/ramda/ramda-tests.ts b/types/ramda/ramda-tests.ts
index 9dcdb4220e..b5fe8d0e5a 100644
--- a/types/ramda/ramda-tests.ts
+++ b/types/ramda/ramda-tests.ts
@@ -391,7 +391,7 @@ R.times(i, 5);
     R.take(2, [1, 2, 3, 4]); // => [1, 2]
 });
 (() => {
-    function f(n: number) {
+    function f(n: number): false | [number, number] {
         return n > 50 ? false : [-n, n + 10];
     }