diff --git a/docs/how-it-works.md b/docs/how-it-works.md
index 369d7fb18..b5a29acbe 100644
--- a/docs/how-it-works.md
+++ b/docs/how-it-works.md
@@ -1,6 +1,6 @@
 # How it works
 
-The objective of this document is to explain how the NGINX Ingress controller works, in particular how the NGINX model is built and why we need a one.
+The objective of this document is to explain how the NGINX Ingress controller works, in particular how the NGINX model is built and why we need one.
 
 ## NGINX configuration