diff --git a/commands/mkdir.c b/commands/mkdir.c
index d0cbcb5d0..4889ec4cf 100644
--- a/commands/mkdir.c
+++ b/commands/mkdir.c
@@ -35,7 +35,7 @@ static int do_mkdir (cmd_tbl_t *cmdtp, int argc, char *argv[])
 	}
 
 	while (i < argc) {
-		if (mkdir(argv[i])) {
+		if (mkdir(argv[i], 0)) {
 			printf("could not create %s: %s\n", argv[i], errno_str());
 			return 1;
 		}
diff --git a/fs/fs.c b/fs/fs.c
index 23a1aa0ad..75c73e125 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -346,7 +346,7 @@ out:
 	return errno;
 }
 
-int open(const char *pathname, int flags)
+int open(const char *pathname, int flags, ...)
 {
 	struct device_d *dev;
 	struct fs_driver_d *fsdrv;
@@ -511,7 +511,7 @@ int erase(int fd, size_t count, unsigned long offset)
 	if (fsdrv->erase)
 		errno = fsdrv->erase(dev, f, count, offset);
 	else
-		errno = -EINVAL;
+		errno = -ENOSYS;
 
 	return errno;
 }
@@ -532,7 +532,7 @@ int protect(int fd, size_t count, unsigned long offset, int prot)
 	if (fsdrv->protect)
 		errno = fsdrv->protect(dev, f, count, offset, prot);
 	else
-		errno = -EINVAL;
+		errno = -ENOSYS;
 
 	return errno;
 }
@@ -763,7 +763,7 @@ out:
 	return errno;
 }
 
-int mkdir (const char *pathname)
+int mkdir (const char *pathname, mode_t mode)
 {
 	struct fs_driver_d *fsdrv;
 	struct device_d *dev;
diff --git a/include/fs.h b/include/fs.h
index f2a9f4985..bc2ed6ccb 100644
--- a/include/fs.h
+++ b/include/fs.h
@@ -86,7 +86,7 @@ struct fs_device_d {
 /*
  * standard posix file functions
  */
-int open(const char *pathname, int flags);
+int open(const char *pathname, int flags, ...);
 int creat(const char *pathname, mode_t mode);
 int unlink(const char *pathname);
 int close(int fd);
@@ -99,7 +99,7 @@ ssize_t write(int fd, const void *buf, size_t count);
 #define SEEK_END	3
 
 off_t lseek(int fildes, off_t offset, int whence);
-int mkdir (const char *pathname);
+int mkdir (const char *pathname, mode_t mode);
 int rmdir (const char *pathname);
 
 const char *getcwd(void);