diff --git a/release/Makefile b/release/Makefile
index 37db800566a7..1dbb5a776097 100644
--- a/release/Makefile
+++ b/release/Makefile
@@ -21,7 +21,7 @@
 #            (by default, the directory above this one)
 #  PORTSDIR: location of ports tree to distribute (default: /usr/ports)
 #  DOCDIR:   location of doc tree (default: /usr/doc)
-#  XTRADIR: xtra-bits-dir argument for <arch>/mkisoimages.sh
+#  XTRADIR:  xtra-bits-dir argument for <arch>/mkisoimages.sh
 #  NOPKG:    if set, do not distribute third-party packages
 #  NOPORTS:  if set, do not distribute ports tree
 #  NOSRC:    if set, do not distribute source tree