diff --git a/include/ircd/fs/iov.h b/include/ircd/fs/iov.h
index ed56ec71b..f1bbf3491 100644
--- a/include/ircd/fs/iov.h
+++ b/include/ircd/fs/iov.h
@@ -18,6 +18,9 @@ extern "C"
 
 namespace ircd::fs
 {
+	using const_buffers = vector_view<const const_buffer>;
+	using mutable_buffers = vector_view<const mutable_buffer>;
+
 	// utility; count the total bytes of an iov.
 	size_t bytes(const vector_view<const struct ::iovec> &);
 
@@ -26,6 +29,6 @@ namespace ircd::fs
 	// array. We get away with using a single buffer because the synchronous
 	// readv()/writev() calls block the thread and for AIO the iov is copied out
 	// of userspace on io_submit().
-	vector_view<const struct ::iovec> make_iov(const vector_view<const const_buffer> &);
-	vector_view<const struct ::iovec> make_iov(const vector_view<const mutable_buffer> &);
+	vector_view<const struct ::iovec> make_iov(const const_buffers &);
+	vector_view<const struct ::iovec> make_iov(const mutable_buffers &);
 }
diff --git a/ircd/aio.cc b/ircd/aio.cc
index aef1cb850..ad1a6b2ef 100644
--- a/ircd/aio.cc
+++ b/ircd/aio.cc
@@ -98,7 +98,7 @@ ircd::fs::aio::request::read::read(const int &fd,
 
 size_t
 ircd::fs::aio::read(const fd &fd,
-                    const vector_view<const mutable_buffer> &bufs,
+                    const mutable_buffers &bufs,
                     const read_opts &opts)
 {
 	aio::request::read request
@@ -135,7 +135,7 @@ ircd::fs::aio::request::write::write(const int &fd,
 
 size_t
 ircd::fs::aio::write(const fd &fd,
-                     const vector_view<const const_buffer> &bufs,
+                     const const_buffers &bufs,
                      const write_opts &opts)
 {
 	aio::request::write request
diff --git a/ircd/fs.cc b/ircd/fs.cc
index 583caa24a..31c2ef626 100644
--- a/ircd/fs.cc
+++ b/ircd/fs.cc
@@ -1028,7 +1028,7 @@ namespace ircd::fs
 }
 
 ircd::vector_view<const struct ::iovec>
-ircd::fs::make_iov(const vector_view<const mutable_buffer> &bufs)
+ircd::fs::make_iov(const mutable_buffers &bufs)
 {
 	size_t i(0);
 	for(; i < bufs.size(); ++i)
@@ -1044,7 +1044,7 @@ ircd::fs::make_iov(const vector_view<const mutable_buffer> &bufs)
 }
 
 ircd::vector_view<const struct ::iovec>
-ircd::fs::make_iov(const vector_view<const const_buffer> &bufs)
+ircd::fs::make_iov(const const_buffers &bufs)
 {
 	size_t i(0);
 	for(; i < bufs.size(); ++i)