diff --git a/common/alloc/buffer.go b/common/alloc/buffer.go
index 64147d25..b3a8ead9 100644
--- a/common/alloc/buffer.go
+++ b/common/alloc/buffer.go
@@ -1,3 +1,4 @@
+// Package alloc provides a light-weight memory allocation mechanism.
 package alloc
 
 import (