diff --git a/Sources/WSCore/Extensions/WebSocketExtensionBuilder.swift b/Sources/WSCore/Extensions/WebSocketExtensionBuilder.swift
index 1f2e5ff..ad1d980 100644
--- a/Sources/WSCore/Extensions/WebSocketExtensionBuilder.swift
+++ b/Sources/WSCore/Extensions/WebSocketExtensionBuilder.swift
@@ -134,7 +134,7 @@ public struct WebSocketExtensionFactory: Sendable {
         self.build = build
     }
 
-    public static func nonNegotiableExtension(_ _build: @escaping @Sendable () -> some WebSocketExtension) -> Self {
+    public static func nonNegotiatedExtension(_ _build: @escaping @Sendable () -> some WebSocketExtension) -> Self {
         return .init {
             WebSocketNonNegotiableExtensionBuilder {
                 _build()
diff --git a/Tests/WebSocketTests/WebSocketExtensionNegotiationTests.swift b/Tests/WebSocketTests/WebSocketExtensionNegotiationTests.swift
index 2db8bff..01071c1 100644
--- a/Tests/WebSocketTests/WebSocketExtensionNegotiationTests.swift
+++ b/Tests/WebSocketTests/WebSocketExtensionNegotiationTests.swift
@@ -99,7 +99,7 @@ final class WebSocketExtensionNegotiationTests: XCTestCase {
 
             func shutdown() async {}
         }
-        let clientExtensionBuilders: [WebSocketExtensionBuilder] = [WebSocketExtensionFactory.nonNegotiableExtension {
+        let clientExtensionBuilders: [WebSocketExtensionBuilder] = [WebSocketExtensionFactory.nonNegotiatedExtension {
             MyExtension()
         }.build()]
         let clientExtensions = try clientExtensionBuilders.buildClientExtensions(from: [:])