diff --git a/docs/collections_doc.md b/docs/collections_doc.md
index f32b964..cc8b6db 100755
--- a/docs/collections_doc.md
+++ b/docs/collections_doc.md
@@ -90,7 +90,7 @@ This behaves like collapsing the first dimension of the iterable.
 
 | Name  | Description | Default Value |
 | :------------- | :------------- | :------------- |
-| <a id="collections.flatten-iterable"></a>iterable |  An iterable of iterables to be collapsed to a list.   |  none |
+| <a id="collections.flatten-iterable"></a>iterable |  An iterable to be collapsed to a list.   |  none |
 
 **RETURNS**
 
diff --git a/lib/collections.bzl b/lib/collections.bzl
index bfb421e..5f59a2d 100644
--- a/lib/collections.bzl
+++ b/lib/collections.bzl
@@ -71,7 +71,7 @@ def _flatten(iterable):
     This behaves like collapsing the first dimension of the iterable.
 
     Args:
-      iterable: An iterable of iterables to be collapsed to a list.
+      iterable: An iterable to be collapsed to a list.
 
     Returns:
       A new list with the collapsed elements from `iterable`.