diff --git a/OptionalEquatableCollection/Array.swift b/OptionalEquatableCollection/Array.swift
index 07f5610..4916e2b 100644
--- a/OptionalEquatableCollection/Array.swift
+++ b/OptionalEquatableCollection/Array.swift
@@ -1,6 +1,5 @@
-// Mark: - Equatable
-
-public func == <T: Equatable>(lhs: Array<T>?, rhs: Array<T>?) -> Bool {
+@warn_unused_result
+public func == <Element: Equatable>(lhs: Array<Element>?, rhs: Array<Element>?) -> Bool {
     switch (lhs, rhs) {
     case let (.Some(lhs), .Some(rhs)):
         return lhs == rhs
diff --git a/OptionalEquatableCollection/Dictionary.swift b/OptionalEquatableCollection/Dictionary.swift
index 0f352fc..def281c 100644
--- a/OptionalEquatableCollection/Dictionary.swift
+++ b/OptionalEquatableCollection/Dictionary.swift
@@ -1,6 +1,5 @@
-// Mark: - Equatable
-
-public func == <T: Equatable, U: Equatable>(lhs: Dictionary<T, U>?, rhs: Dictionary<T, U>?) -> Bool {
+@warn_unused_result
+public func == <Key: Equatable, Value: Equatable>(lhs: [Key: Value]?, rhs: [Key: Value]?) -> Bool {
     switch (lhs, rhs) {
     case let (.Some(lhs), .Some(rhs)):
         return lhs == rhs