Index: uspace/srv/fs/minixfs/mfs_ops.c
===================================================================
--- uspace/srv/fs/minixfs/mfs_ops.c	(revision ac28650c777e9db77b896b63c3b1107e9a797daa)
+++ uspace/srv/fs/minixfs/mfs_ops.c	(revision a04b62df2216ec041eea0f85b0a3c942714ddc86)
@@ -184,4 +184,5 @@
 		sbi->nzones = conv32(native, sb3->s_nzones);
 		sbi->block_size = conv16(native, sb3->s_block_size);
+		sbi->dirsize = MFS3_DIRSIZE;
 	} else {
 		sbi->ninodes = conv16(native, sb->s_ninodes);
@@ -195,4 +196,5 @@
 		if (version == MFS_VERSION_V2)
 			sbi->nzones = conv32(native, sb->s_nzones2);
+		sbi->dirsize = longnames ? MFSL_DIRSIZE : MFS_DIRSIZE;
 	}