diff --git a/atom/browser/mac/atom_application.h b/atom/browser/mac/atom_application.h
index ad513dadb3e5b..f46cb48d00353 100644
--- a/atom/browser/mac/atom_application.h
+++ b/atom/browser/mac/atom_application.h
@@ -33,6 +33,14 @@ typedef NS_ENUM(NSInteger, LABiometryType) {
 
 #endif
 
+typedef NSString* NSAppearanceName;
+
+@interface NSApplication (MojaveSDK)
+@property(readonly, strong) NSAppearance* effectiveAppearance;
+@end
+
+BASE_EXPORT extern NSAppearanceName const NSAppearanceNameDarkAqua;
+
 // forward declare Access APIs
 typedef NSString* AVMediaType NS_EXTENSIBLE_STRING_ENUM;
 
diff --git a/atom/browser/ui/tray_icon_cocoa.mm b/atom/browser/ui/tray_icon_cocoa.mm
index f625ce6885916..0e03d4274c7a9 100644
--- a/atom/browser/ui/tray_icon_cocoa.mm
+++ b/atom/browser/ui/tray_icon_cocoa.mm
@@ -7,7 +7,6 @@
 #include "atom/browser/mac/atom_application.h"
 #include "atom/browser/ui/cocoa/NSString+ANSI.h"
 #include "atom/browser/ui/cocoa/atom_menu_controller.h"
-#include "base/mac/sdk_forward_declarations.h"
 #include "base/strings/sys_string_conversions.h"
 #include "ui/display/screen.h"
 #include "ui/events/cocoa/cocoa_event_utils.h"