diff --git a/docs/content/breaking-changes/breaking-changes.md b/docs/content/breaking-changes/breaking-changes.md
index 807a146b2889..82ec524a45fc 100644
--- a/docs/content/breaking-changes/breaking-changes.md
+++ b/docs/content/breaking-changes/breaking-changes.md
@@ -57,7 +57,9 @@ For more information, see
 * <a name="resource-schema-field-removal-or-rename"></a>Removing or renaming a field 
 * <a name="field-changing-type"></a> Changing field output type
   * Between primitive types, like changing a String to an Integer
-  * Between complex types like changing a List to a Set.
+  * Between complex types like changing a List to a Set. Note that List -> Set
+    can be considered non-breaking if the field is unordered and the order
+    returned from the API changes unpredictably.
   * Changing the field type between primitive and complex data
     types is not possible. For this scenario, field renames are preferred.
 * <a name="field-optional-to-required"></a> Making an optional field required or adding a new required field