diff --git a/include/ircd/buffer/shared_buffer.h b/include/ircd/buffer/shared_buffer.h
index 4980d6e63..50dc2269e 100644
--- a/include/ircd/buffer/shared_buffer.h
+++ b/include/ircd/buffer/shared_buffer.h
@@ -19,6 +19,7 @@ struct ircd::buffer::shared_buffer
 ,buffer
 {
 	shared_buffer(const size_t &size);
+	shared_buffer(unique_buffer<buffer> &&);
 	explicit shared_buffer(const const_buffer &);
 	shared_buffer() = default;
 	shared_buffer(shared_buffer &&) = default;
@@ -27,19 +28,6 @@ struct ircd::buffer::shared_buffer
 	shared_buffer &operator=(const shared_buffer &) = default;
 };
 
-template<class buffer>
-ircd::buffer::shared_buffer<buffer>::shared_buffer(const size_t &size)
-:std::shared_ptr<char>
-{
-	new __attribute__((aligned(16))) char[size],
-	std::default_delete<char[]>()
-}
-,buffer
-{
-	this->std::shared_ptr<char>::get(), size
-}
-{}
-
 template<class buffer>
 ircd::buffer::shared_buffer<buffer>::shared_buffer(const const_buffer &src)
 :shared_buffer
@@ -51,3 +39,33 @@ ircd::buffer::shared_buffer<buffer>::shared_buffer(const const_buffer &src)
 	assert(size(dst) == size(src));
 	copy(dst, src);
 }
+
+template<class buffer>
+ircd::buffer::shared_buffer<buffer>::shared_buffer(unique_buffer<buffer> &&buf)
+:std::shared_ptr<char>
+{
+	data(buf),
+	std::default_delete<char[]>()
+}
+,buffer
+{
+	this->std::shared_ptr<char>::get(),
+	size(buf)
+}
+{
+	buf.release();
+}
+
+template<class buffer>
+ircd::buffer::shared_buffer<buffer>::shared_buffer(const size_t &size)
+:std::shared_ptr<char>
+{
+	new __attribute__((aligned(16))) char[size],
+	std::default_delete<char[]>()
+}
+,buffer
+{
+	this->std::shared_ptr<char>::get(),
+	size
+}
+{}