Index: abi/include/abi/errno.h
===================================================================
--- abi/include/abi/errno.h	(revision 0d0b3197a149bb5e5c53d21136df5b8c283cdc4a)
+++ abi/include/abi/errno.h	(revision e5fe873e6ece249ae475d58dae9a738bfe8b8ea0)
@@ -57,4 +57,6 @@
  */
 
+/* COMPAT_START -- do not remove or edit this comment */
+
 #define E2BIG             __errno_t(  101)
 #define EACCES            __errno_t(  102)
Index: abi/include/abi/errno.in
===================================================================
--- abi/include/abi/errno.in	(revision 0d0b3197a149bb5e5c53d21136df5b8c283cdc4a)
+++ abi/include/abi/errno.in	(revision e5fe873e6ece249ae475d58dae9a738bfe8b8ea0)
@@ -55,4 +55,6 @@
  * move it up to the first group.
  */
+
+/* COMPAT_START -- do not remove or edit this comment */
 
 __errno_entry(E2BIG            ,  101, "Argument list too long")