diff --git a/libsrc/cbm/oserror.s b/libsrc/cbm/oserror.s
index 1f40685cb..de1b08c0d 100644
--- a/libsrc/cbm/oserror.s
+++ b/libsrc/cbm/oserror.s
@@ -5,7 +5,6 @@
 ; /* Map a system specific error into a system independent code */
 ;
 
-	.export		__osmaperrno
 	.include	"errno.inc"
 
 .code