diff --git a/library/core/src/cmp.rs b/library/core/src/cmp.rs
index fadf2fcc9fc..efab04bca23 100644
--- a/library/core/src/cmp.rs
+++ b/library/core/src/cmp.rs
@@ -707,7 +707,8 @@ fn clone_from(&mut self, other: &Self) {
 /// [lexicographic](https://en.wikipedia.org/wiki/Lexicographic_order) ordering
 /// based on the top-to-bottom declaration order of the struct's members.
 ///
-/// When `derive`d on enums, variants are ordered by their discriminants.
+/// When `derive`d on enums, variants are ordered primarily by their discriminants.
+/// Secondarily, they are ordered by their fields.
 /// By default, the discriminant is smallest for variants at the top, and
 /// largest for variants at the bottom. Here's an example:
 ///
@@ -960,7 +961,8 @@ fn clamp(self, min: Self, max: Self) -> Self
 /// [lexicographic](https://en.wikipedia.org/wiki/Lexicographic_order) ordering
 /// based on the top-to-bottom declaration order of the struct's members.
 ///
-/// When `derive`d on enums, variants are ordered by their discriminants.
+/// When `derive`d on enums, variants are primarily ordered by their discriminants.
+/// Secondarily, they are ordered by their fields.
 /// By default, the discriminant is smallest for variants at the top, and
 /// largest for variants at the bottom. Here's an example:
 ///