diff --git a/common/net/connection.go b/common/net/connection.go
index a035803f..0540ce99 100644
--- a/common/net/connection.go
+++ b/common/net/connection.go
@@ -117,6 +117,7 @@ func (c *connection) Write(b []byte) (int, error) {
 
 func (c *connection) WriteMultiBuffer(mb buf.MultiBuffer) error {
 	if c.done.Done() {
+		buf.ReleaseMulti(mb)
 		return io.ErrClosedPipe
 	}