diff --git a/README.adoc b/README.adoc
index 80985a7f..6c5d8dd0 100644
--- a/README.adoc
+++ b/README.adoc
@@ -161,9 +161,9 @@ It is sensible to also heed the following guidelines:
     on low-powered hardware, such as phones and old computers.
   * Test your levels in https://www.chocolate-doom.org/[Chocolate
     Doom] to make sure that vanilla compatibility is maintained.  This
-    is an engine with strict adherence to vanilla Doom limits and bugs
-    and working it assures that levels can be played with any _Doom_
-    engine.
+    is an engine with strict adherence to vanilla Doom limits and
+    bugs, and working in it assures that levels can be played with any
+    _Doom_ engine.
 
 === Graphics