diff --git a/include/wx/osx/cocoa/private.h b/include/wx/osx/cocoa/private.h
index d6b3d57abd..a9d77d1fc5 100644
--- a/include/wx/osx/cocoa/private.h
+++ b/include/wx/osx/cocoa/private.h
@@ -352,7 +352,7 @@ protected :
     - (void)sheetDidEnd:(NSWindow *)sheet returnCode:(int)returnCode contextInfo:(void *)contextInfo;
     @end
 
-    @interface wxNSAppController : NSObject wxOSX_10_6_AND_LATER(<NSApplicationDelegate>)
+    WXEXPORT @interface wxNSAppController : NSObject wxOSX_10_6_AND_LATER(<NSApplicationDelegate>)
     {
     }