diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 5c50d3d..39ef981 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -971,4 +971,9 @@ int fuse_set_acl(struct inode *inode, struct posix_acl *acl, int type);
 /* readdir.c */
 int fuse_readdir(struct file *file, struct dir_context *ctx);
 
+/**
+ * Return the number of bytes in an arguments list
+ */
+unsigned int fuse_len_args(unsigned int numargs, struct fuse_arg *args);
+
 #endif /* _FS_FUSE_I_H */