diff --git a/library/core/src/iter/sources/successors.rs b/library/core/src/iter/sources/successors.rs
index 6a6cbe905e464..7f7b2c7756628 100644
--- a/library/core/src/iter/sources/successors.rs
+++ b/library/core/src/iter/sources/successors.rs
@@ -17,7 +17,7 @@ where
     F: FnMut(&T) -> Option<T>,
 {
     // If this function returned `impl Iterator<Item=T>`
-    // it could be based on `unfold` and not need a dedicated type.
+    // it could be based on `from_fn` and not need a dedicated type.
     // However having a named `Successors<T, F>` type allows it to be `Clone` when `T` and `F` are.
     Successors { next: first, succ }
 }