Index: uspace/srv/fs/fat/fat_dentry.c
===================================================================
--- uspace/srv/fs/fat/fat_dentry.c	(revision 5ca5eaa780223488e3f882cc226da0c2c5d9ced6)
+++ uspace/srv/fs/fat/fat_dentry.c	(revision 8f74140ca5b19e8eb5dec7c5bc38675d17d80bdf)
@@ -42,5 +42,5 @@
 static bool is_d_char(const char ch)
 {
-	if (isalnum(ch) || ch == '_')
+	if (isalnum(ch) || ch == '_' || ch == '-')
 		return true;
 	else