diff --git a/CHANGES b/CHANGES
index 84d31d71..37f5f8fe 100644
--- a/CHANGES
+++ b/CHANGES
@@ -29,6 +29,7 @@ bash-completion (1.x)
   * Rename installed_alternatives() to _installed_alternatives().
   * Add /etc/pki/tls/openssl.cnf to list of default openssl config files,
     search for default ones only if -config is not given.
+  * Use POSIX compliant arguments to tail in mkisofs completion.
 
   [ Todd Zullinger ]
   * Make yum complete on filenames after install, deplist, update and upgrade
diff --git a/bash_completion b/bash_completion
index 3ec3f0dc..63f40c39 100644
--- a/bash_completion
+++ b/bash_completion
@@ -6115,7 +6115,7 @@ _mkisofs()
 			;;
 		-*-charset)
 			COMPREPLY=( $( mkisofs -input-charset help 2>&1 | \
-					tail +3 | grep "^$cur") )
+					tail -n +3 | grep "^$cur") )
 			return 0
 			;;
 		-uid)