diff --git a/zip-0400.rst b/zip-0400.rst
index f67b76fc..eb0ee569 100644
--- a/zip-0400.rst
+++ b/zip-0400.rst
@@ -23,7 +23,7 @@ This proposal defines the current format used in zcashd for wallet persistent st
 Motivation
 ==========
 
-The process of saving wallet data into disk is currently unspecified. The key-values used in the current implementation are undocumented and by this structure and functionality is unknown without a deep analysis of the involved source code. This document details the schema and the mechanics of the wallet database. This is an informational document, no changes will be done to the source code.
+The process of saving wallet data into disk is currently unspecified. The key-values used in the current implementation are undocumented, and their structure and functionality are unknown without a deep analysis of the involved source code. This document details the schema and the mechanics of the wallet database. This is an informational document, no changes will be done to the source code.
 
 Specification
 =============