diff --git a/curriculum/challenges/english/blocks/lecture-what-is-css/672acbbe2891564c4e316164.md b/curriculum/challenges/english/blocks/lecture-what-is-css/672acbbe2891564c4e316164.md
index 1d2b95af377..ae7201f3b2a 100644
--- a/curriculum/challenges/english/blocks/lecture-what-is-css/672acbbe2891564c4e316164.md
+++ b/curriculum/challenges/english/blocks/lecture-what-is-css/672acbbe2891564c4e316164.md
@@ -55,7 +55,7 @@ p {
 
 In this CSS rule, a type selector targets all paragraph elements on the page.
 
-Inside the declaration block, there is a one declaration.
+Inside the declaration block, there is one declaration.
 
 The declaration consists of the `color` property with a value set to `blue`. This will change the text color for all paragraph elements to `blue`.