diff --git a/exec/errno.inc b/exec/errno.inc
index 013c39d799e186fe2660c88d88ef320ce972eeaf..7029d99551d94a91b687c936510a802985a81416 100644
--- a/exec/errno.inc
+++ b/exec/errno.inc
@@ -1,9 +1,15 @@
-# ERRNO.INC
+# errno.inc
 
 # 	 Defines the system error variable _errno and the error
 # 	 numbers set by system calls. Errors which exist in Unix(tm)
 # 	 but not MSDOS have value -1.
 
+# $id$
+
+# @format.tab-size 8, @format.use-tabs true
+
+!global _ERRNO
+
 !define EZERO 	 0			# Error 0
 !define EINVFNC  1			# Invalid function number
 !define ENOFILE  2			# File not found