diff --git a/src/plugins/help/macwebkithelpviewer.mm b/src/plugins/help/macwebkithelpviewer.mm
index 57e18bc190b..907073f6b3d 100644
--- a/src/plugins/help/macwebkithelpviewer.mm
+++ b/src/plugins/help/macwebkithelpviewer.mm
@@ -197,7 +197,7 @@ static void ensureProtocolHandler()
 
 // #pragma mark -- FrameLoadDelegate
 
-@interface FrameLoadDelegate : NSObject<WebFrameLoadDelegate>
+@interface FrameLoadDelegate : NSObject
 {
     WebFrame *mainFrame;
     Help::Internal::MacWebKitHelpViewer *viewer;
@@ -275,7 +275,7 @@ static void ensureProtocolHandler()
 
 // #pragma mark -- UIDelegate
 
-@interface UIDelegate : NSObject<WebUIDelegate>
+@interface UIDelegate : NSObject
 {
     Help::Internal::MacWebKitHelpWidget *widget;
 }