diff --git a/packages/gatsby-plugin-sass/README.md b/packages/gatsby-plugin-sass/README.md
index 797d2e4c9c1c2..e9b79aaeec2a8 100644
--- a/packages/gatsby-plugin-sass/README.md
+++ b/packages/gatsby-plugin-sass/README.md
@@ -54,7 +54,7 @@ Any file with the `module` extension will use CSS Modules.
 
 ### PostCSS plugins
 
-PostCSS is also included to handle some default optimizations like autoprefixing a
+PostCSS is also included to handle some default optimizations like autoprefixing
 and common cross-browser flexbox bugs. Normally you don't need to think about it, but if
 you'd prefer to add additional postprocessing to your SASS output you can specify plugins
 in the plugin options