diff --git ui/base/cocoa/underlay_opengl_hosting_window.h ui/base/cocoa/underlay_opengl_hosting_window.h
index d673c31..806d134 100644
--- ui/base/cocoa/underlay_opengl_hosting_window.h
+++ ui/base/cocoa/underlay_opengl_hosting_window.h
@@ -12,7 +12,7 @@
 // Common base class for windows that host a OpenGL surface that renders under
 // the window. Previously contained methods related to hole punching, now just
 // contains common asserts.
-UI_BASE_EXPORT
+__attribute__((visibility("default")))
 @interface UnderlayOpenGLHostingWindow : NSWindow
 @end