diff --git a/lib/filesystem.js b/lib/filesystem.js
index ddfd91ae..611a6c85 100644
--- a/lib/filesystem.js
+++ b/lib/filesystem.js
@@ -511,7 +511,15 @@ FS.prototype.CreateInode = function() {
 };
 
 
+// Note: parentid = -1 for initial root directory.
 FS.prototype.CreateDirectory = function(name, parentid) {
+    const parent_inode = this.inodes[parentid];
+    if(parentid >= 0 && this.is_forwarder(parent_inode))
+    {
+        const foreign_parentid = parent_inode.foreign_id;
+        const foreign_id = this.follow_fs(parent_inode).CreateDirectory(name, foreign_parentid);
+        return this.create_forwarder(parent_inode.mount_id, foreign_id);
+    }
     var x = this.CreateInode();
     x.name = name;
     x.parentid = parentid;
@@ -531,6 +539,13 @@ FS.prototype.CreateDirectory = function(name, parentid) {
 };
 
 FS.prototype.CreateFile = function(filename, parentid) {
+    const parent_inode = this.inodes[parentid];
+    if(this.is_forwarder(parent_inode))
+    {
+        const foreign_parentid = parent_inode.foreign_id;
+        const foreign_id = this.follow_fs(parent_inode).CreateFile(filename, foreign_parentid);
+        return this.create_forwarder(parent_inode.mount_id, foreign_id);
+    }
     var x = this.CreateInode();
     x.dirty = true;
     x.name = filename;
@@ -547,6 +562,14 @@ FS.prototype.CreateFile = function(filename, parentid) {
 
 
 FS.prototype.CreateNode = function(filename, parentid, major, minor) {
+    const parent_inode = this.inodes[parentid];
+    if(this.is_forwarder(parent_inode))
+    {
+        const foreign_parentid = parent_inode.foreign_id;
+        const foreign_id =
+            this.follow_fs(parent_inode).CreateNode(filename, foreign_parentid, major, minor);
+        return this.create_forwarder(parent_inode.mount_id, foreign_id);
+    }
     var x = this.CreateInode();
     x.name = filename;
     x.parentid = parentid;
@@ -562,6 +585,14 @@ FS.prototype.CreateNode = function(filename, parentid, major, minor) {
 };
 
 FS.prototype.CreateSymlink = function(filename, parentid, symlink) {
+    const parent_inode = this.inodes[parentid];
+    if(this.is_forwarder(parent_inode))
+    {
+        const foreign_parentid = parent_inode.foreign_id;
+        const foreign_id =
+            this.follow_fs(parent_inode).CreateSymlink(filename, foreign_parentid, symlink);
+        return this.create_forwarder(parent_inode.mount_id, foreign_id);
+    }
     var x = this.CreateInode();
     x.name = filename;
     x.parentid = parentid;
@@ -576,6 +607,14 @@ FS.prototype.CreateSymlink = function(filename, parentid, symlink) {
 };
 
 FS.prototype.CreateTextFile = function(filename, parentid, str) {
+    const parent_inode = this.inodes[parentid];
+    if(this.is_forwarder(parent_inode))
+    {
+        const foreign_parentid = parent_inode.foreign_id;
+        const foreign_id =
+            this.follow_fs(parent_inode).CreateTextFile(filename, foreign_parentid, str);
+        return this.create_forwarder(parent_inode.mount_id, foreign_id);
+    }
     var id = this.CreateFile(filename, parentid);
     var x = this.inodes[id];
     var data = this.inodedata[id] = new Uint8Array(str.length);
@@ -591,6 +630,14 @@ FS.prototype.CreateTextFile = function(filename, parentid, str) {
  * @param {Uint8Array} buffer
  */
 FS.prototype.CreateBinaryFile = function(filename, parentid, buffer) {
+    const parent_inode = this.inodes[parentid];
+    if(this.is_forwarder(parent_inode))
+    {
+        const foreign_parentid = parent_inode.foreign_id;
+        const foreign_id =
+            this.follow_fs(parent_inode).CreateBinaryFile(filename, foreign_parentid, buffer);
+        return this.create_forwarder(parent_inode.mount_id, foreign_id);
+    }
     var id = this.CreateFile(filename, parentid);
     var x = this.inodes[id];
     var data = this.inodedata[id] = new Uint8Array(buffer.length);