diff --git a/headers/private/kernel/syscalls.h b/headers/private/kernel/syscalls.h
index 333553517c..be7ce5bf22 100644
--- a/headers/private/kernel/syscalls.h
+++ b/headers/private/kernel/syscalls.h
@@ -115,6 +115,7 @@ extern int			_kern_open_dir_entry_ref(dev_t device, ino_t inode, const char *nam
 extern int			_kern_open_dir(int fd, const char *path);
 extern int			_kern_open_parent_dir(int fd, char *name,
 						size_t nameLength);
+extern status_t		_kern_fcntl(int fd, int op, uint32 argument);
 extern status_t		_kern_fsync(int fd);
 extern off_t		_kern_seek(int fd, off_t pos, int seekType);
 extern int			_kern_create_entry_ref(dev_t device, ino_t inode, const char *uname, int omode, int perms);
diff --git a/headers/private/kernel/vfs.h b/headers/private/kernel/vfs.h
index 14ca849c02..949e538de6 100755
--- a/headers/private/kernel/vfs.h
+++ b/headers/private/kernel/vfs.h
@@ -94,6 +94,7 @@ int _user_open_dir_node_ref(dev_t device, ino_t inode);
 int _user_open_dir_entry_ref(dev_t device, ino_t inode, const char *uname);
 int _user_open_dir(int fd, const char *path);
 int _user_open_parent_dir(int fd, char *name, size_t nameLength);
+status_t _user_fcntl(int fd, int op, uint32 argument);
 status_t _user_fsync(int fd);
 status_t _user_read_stat(int fd, const char *path, bool traverseLink,
 			struct stat *stat, size_t statSize);