diff --git a/atom/browser/mac/atom_application.h b/atom/browser/mac/atom_application.h
index ad513dadb3e5b..0b8195772ad01 100644
--- a/atom/browser/mac/atom_application.h
+++ b/atom/browser/mac/atom_application.h
@@ -10,13 +10,17 @@
 #import <LocalAuthentication/LocalAuthentication.h>
 
 // Forward Declare Appearance APIs
-@interface NSApplication (HighSierraSDK)
+typedef NSString* NSAppearanceName;
+
+@interface NSApplication (MojaveSDK)
 @property(copy, readonly)
     NSAppearance* effectiveAppearance API_AVAILABLE(macosx(10.14));
 @property(copy, readonly) NSAppearance* appearance API_AVAILABLE(macosx(10.14));
 - (void)setAppearance:(NSAppearance*)appearance API_AVAILABLE(macosx(10.14));
 @end
 
+BASE_EXPORT extern NSAppearanceName const NSAppearanceNameDarkAqua;
+
 #if !defined(MAC_OS_X_VERSION_10_13_2)
 
 // forward declare Touch ID APIs
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"