diff --git a/usr.sbin/makefs/cd9660.c b/usr.sbin/makefs/cd9660.c
--- a/usr.sbin/makefs/cd9660.c
+++ b/usr.sbin/makefs/cd9660.c
@@ -1664,12 +1664,8 @@
 			else if (isupper((unsigned char)*oldname) ||
 			    isdigit((unsigned char)*oldname))
 				*newname++ = *oldname;
-			else if (diskStructure->allow_multidot &&
-			    *oldname == '.') {
-				*newname++ = '.';
-			} else {
+			else
 				*newname++ = '_';
-			}
 
 			if (found_ext)
 				extlen++;