diff --git a/WebAssembly.md b/WebAssembly.md
index c2a7865..81c4b12 100644
--- a/WebAssembly.md
+++ b/WebAssembly.md
@@ -411,7 +411,7 @@ Module
 
 ### Module Contents
 
-A module starts with header:
+A module starts with a header:
 
 | Field Name     | Type     | Description                                                             |
 | -------------- | -------- | ----------------------------------------------------------------------- |