diff --git a/rfcs/0137-nix-language-version.md b/rfcs/0137-nix-language-version.md
index 8ad6a92..9b14a82 100644
--- a/rfcs/0137-nix-language-version.md
+++ b/rfcs/0137-nix-language-version.md
@@ -150,7 +150,7 @@ Once the language version is accessible though, tooling can at least be adapted
 
    </details>
 
-1. The language version for Nix expressions is denoted in special syntax at the beginning of parse unit.
+1. The language version for Nix expressions is denoted in special syntax, at the beginning of a parse unit.
 
    <details><summary>Arguments</summary>