diff --git a/atom/browser/ui/cocoa/touch_bar_forward_declarations.h b/atom/browser/ui/cocoa/touch_bar_forward_declarations.h
index 898bdee25e2f..1a5d9311d240 100644
--- a/atom/browser/ui/cocoa/touch_bar_forward_declarations.h
+++ b/atom/browser/ui/cocoa/touch_bar_forward_declarations.h
@@ -199,14 +199,21 @@ static const NSTouchBarItemIdentifier NSTouchBarItemIdentifierOtherItemsProxy =
 @optional
 - (nullable NSTouchBarItem*)touchBar:(NSTouchBar*)touchBar
                makeItemForIdentifier:(NSTouchBarItemIdentifier)identifier;
+
 @end
 
 @protocol NSScrubberDelegate<NSObject>
 
+- (void)scrubber:(NSScrubber *)scrubber didHighlightItemAtIndex:(NSInteger)highlightedIndex;
+- (void)scrubber:(NSScrubber *)scrubber didSelectItemAtIndex:(NSInteger)selectedIndex;
+
 @end
 
 @protocol NSScrubberDataSource<NSObject>
 
+- (NSInteger)numberOfItemsForScrubber:(NSScrubber *)scrubber;
+- (NSInteger)numberOfItemsForScrubber:(NSScrubber *)scrubber;
+
 @end
 
 #pragma clang assume_nonnull end