diff -r 22ced1a079e0 accessible/ipc/extension/other/moz.build
--- a/accessible/ipc/extension/other/moz.build	Mon Sep 16 22:30:52 2019 +0300
+++ b/accessible/ipc/extension/other/moz.build	Tue Sep 17 23:17:02 2019 +0200
@@ -9,7 +9,8 @@
 
 IPDL_SOURCES += ['PDocAccessiblePlatformExt.ipdl']
 
-if CONFIG['ACCESSIBILITY']:
+#if CONFIG['ACCESSIBILITY']:
+if 1:
     EXPORTS.mozilla.a11y += [
         'DocAccessiblePlatformExtChild.h',
         'DocAccessiblePlatformExtParent.h',