diff --git a/fs/nfs/nfs_adapter.c b/fs/nfs/nfs_adapter.c
index 3ccb84795abfd8a3eed8e51b860a121c8b2cc633..42173219598db769ac8ec411a0a9ce5ea8883c0b 100644
--- a/fs/nfs/nfs_adapter.c
+++ b/fs/nfs/nfs_adapter.c
@@ -2158,7 +2158,7 @@ errout_with_mutex:
   return -error;
 }
 
-int vfs_nfs_unlink(struct Vnode *parent, struct Vnode *target, char *filename)
+int vfs_nfs_unlink(struct Vnode *parent, struct Vnode *target, const char *filename)
 {
   struct nfsmount *nmp = (struct nfsmount *)(parent->originMount->data);
   struct nfsnode  *parent_node = NULL;
@@ -2222,7 +2222,7 @@ errout_with_mutex:
   return -error;
 }
 
-int vfs_nfs_rmdir(struct Vnode *parent, struct Vnode *target, char *dirname)
+int vfs_nfs_rmdir(struct Vnode *parent, struct Vnode *target, const char *dirname)
 {
   struct nfsmount *nmp = (struct nfsmount *)(parent->originMount->data);
   struct nfsnode  *parent_node = NULL;
diff --git a/fs/tmpfs/fs_tmpfs.c b/fs/tmpfs/fs_tmpfs.c
index a6c7e95a5893f00458a87e98a85ffd450c322922..daa2dc964c31df7239e18e77810f9ab8c2da8bec 100755
--- a/fs/tmpfs/fs_tmpfs.c
+++ b/fs/tmpfs/fs_tmpfs.c
@@ -140,8 +140,8 @@ int tmpfs_readdir(struct Vnode *vp, struct fs_dirent_s *dir);
 int tmpfs_rename(struct Vnode *oldVnode, struct Vnode *newParent, const char *oldname, const char *newname);
 int tmpfs_mkdir(struct Vnode *parent, const char *relpath, mode_t mode, struct Vnode **vpp);
 int tmpfs_create(struct Vnode *dvp, const char *path, int mode, struct Vnode **vpp);
-int tmpfs_unlink(struct Vnode *parent, struct Vnode *node, char *relpath);
-int tmpfs_rmdir(struct Vnode *parent, struct Vnode *target, char *dirname);
+int tmpfs_unlink(struct Vnode *parent, struct Vnode *node, const char *relpath);
+int tmpfs_rmdir(struct Vnode *parent, struct Vnode *target, const char *dirname);
 int tmpfs_reclaim(struct Vnode *vp);
 
 int tmpfs_statfs(struct Mount *mp, struct statfs *sbp);
@@ -1854,7 +1854,7 @@ int tmpfs_statfs(struct Mount *mp, struct statfs *sbp)
  * Name: tmpfs_unlink
  ****************************************************************************/
 
-int tmpfs_unlink(struct Vnode *parent, struct Vnode *node, char *relpath)
+int tmpfs_unlink(struct Vnode *parent, struct Vnode *node, const char *relpath)
 {
   FAR struct tmpfs_s *fs;
   FAR struct tmpfs_directory_s *parent_dir;
@@ -2041,7 +2041,7 @@ errout_with_lock:
  * Name: tmpfs_rmdir
  ****************************************************************************/
 
-int tmpfs_rmdir(struct Vnode *parent, struct Vnode *target, char *dirname)
+int tmpfs_rmdir(struct Vnode *parent, struct Vnode *target, const char *dirname)
 {
   FAR struct tmpfs_s *fs;
   FAR struct tmpfs_directory_s *parent_dir;