diff --git a/set/OWNERS b/set/OWNERS
index 34bce769..9d2d33e7 100644
--- a/set/OWNERS
+++ b/set/OWNERS
@@ -3,8 +3,6 @@
 reviewers:
   - logicalhan
   - thockin
-  - lavalamp
 approvers:
   - logicalhan
   - thockin
-  - lavalamp
\ No newline at end of file
diff --git a/set/ordered.go b/set/ordered.go
index c7acaaec..6e5c6db3 100644
--- a/set/ordered.go
+++ b/set/ordered.go
@@ -1,5 +1,5 @@
 /*
-Copyright 2022 The Kubernetes Authors.
+Copyright 2023 The Kubernetes Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
diff --git a/set/set.go b/set/set.go
index 97d829b6..b115d0b7 100644
--- a/set/set.go
+++ b/set/set.go
@@ -1,5 +1,5 @@
 /*
-Copyright 2022 The Kubernetes Authors.
+Copyright 2023 The Kubernetes Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -210,8 +210,8 @@ func (s Set[T]) Clone() Set[T] {
 // s2 = {a1, a2, a4, a5}
 // s1.SymmetricDifference(s2) = {a3, a4, a5}
 // s2.SymmetricDifference(s1) = {a3, a4, a5}
-func (s1 Set[T]) SymmetricDifference(s2 Set[T]) Set[T] {
-	return s1.Difference(s2).Union(s2.Difference(s1))
+func (s Set[T]) SymmetricDifference(s2 Set[T]) Set[T] {
+	return s.Difference(s2).Union(s2.Difference(s))
 }
 
 // Clear empties the set.
diff --git a/set/set_test.go b/set/set_test.go
index 02f923a7..c910ce0a 100644
--- a/set/set_test.go
+++ b/set/set_test.go
@@ -1,5 +1,5 @@
 /*
-Copyright 2014 The Kubernetes Authors.
+Copyright 2023 The Kubernetes Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.