diff --git a/asminc/errno.inc b/asminc/errno.inc
index 5f980cbf6..28cf6f11e 100644
--- a/asminc/errno.inc
+++ b/asminc/errno.inc
@@ -8,22 +8,26 @@
         .global         __maperrno, __osmaperrno
 
 ; Error codes, must match the values in the C headers
-ENOENT		=	1	; No such file or directory
-ENOMEM		=	2	; Out of memory
-EACCES		=	3	; Permission denied
-ENODEV		=	4	; No such device
-EMFILE		=	5	; Too many open files
-EBUSY		=	6	; Device or resource busy
-EINVAL		=	7	; Invalid argument
-ENOSPC		=	8	; No space left on device
-EEXIST		=	9	; File exists
-EAGAIN		=	10	; Try again
-EIO		=	11	; I/O error
-EINTR		=	12	; Interrupted system call
-ENOSYS		=	13	; Function not implemented
-ESPIPE		=	14	; Illegal seek
-ERANGE          =       15      ; Range error
-EUNKNOWN       	=      	16	; Unknown OS specific error - must be last!
+.enum
+        EOK                     ; No error
+        ENOENT 	       	        ; No such file or directory
+        ENOMEM 	       	        ; Out of memory
+        EACCES 	       	        ; Permission denied
+        ENODEV 	       	        ; No such device
+        EMFILE 	       	        ; Too many open files
+        EBUSY  	       	        ; Device or resource busy
+        EINVAL 	       	        ; Invalid argument
+        ENOSPC 	       	        ; No space left on device
+        EEXIST 	       	        ; File exists
+        EAGAIN 	       	        ; Try again
+        EIO    	       	        ; I/O error
+        EINTR  	       	        ; Interrupted system call
+        ENOSYS 	       	        ; Function not implemented
+        ESPIPE 	       	        ; Illegal seek
+        ERANGE                  ; Range error
+        EUNKNOWN       	        ; Unknown OS specific error - must be last!
+
+        EMAX    = EUNKNOWN      ; Highest error code
+.endenum
 
-EMAX		=	16	; Highest error code