diff --git a/guides/source/upgrading_ruby_on_rails.md b/guides/source/upgrading_ruby_on_rails.md
index 2372590cec..dda2b12a3a 100644
--- a/guides/source/upgrading_ruby_on_rails.md
+++ b/guides/source/upgrading_ruby_on_rails.md
@@ -325,7 +325,7 @@ should support caching.
 
 #### Configure the Output of `db:structure:dump`
 
-If you're using `schema_search_path` or other PostgreSQL extentions, you can control how the schema is
+If you're using `schema_search_path` or other PostgreSQL extensions, you can control how the schema is
 dumped. Set to `:all` to generate all dumps, or to `:schema_search_path` to generate from schema search path.
 
     config.active_record.dump_schemas = :all