diff --git a/guides/source/asset_pipeline.md b/guides/source/asset_pipeline.md
index aa0e0a3042..448f0e1f9a 100644
--- a/guides/source/asset_pipeline.md
+++ b/guides/source/asset_pipeline.md
@@ -768,7 +768,7 @@ end
 ```
 
 Now that you have a `Template` class, it's time to associate it with an
-extenstion for template files:
+extension for template files:
 
 ```ruby
 Sprockets.register_engine '.bang', BangBang::Template
diff --git a/guides/source/form_helpers.md b/guides/source/form_helpers.md
index 4e935442cc..dd641c2e29 100644
--- a/guides/source/form_helpers.md
+++ b/guides/source/form_helpers.md
@@ -423,7 +423,7 @@ Whenever Rails sees that the internal value of an option being generated matches
 
 TIP: The second argument to `options_for_select` must be exactly equal to the desired internal value. In particular if the value is the integer 2 you cannot pass "2" to `options_for_select` — you must pass 2. Be aware of values extracted from the `params` hash as they are all strings.
 
-WARNING: when `:include_blank` or `:prompt` are not present, `:include_blank` is forced true if the select attribute `required` is true, display `size` is one and `multiple` is not true.
+WARNING: when `:include_blank` or `:prompt:` are not present, `:include_blank` is forced true if the select attribute `required` is true, display `size` is one and `multiple` is not true.
 
 You can add arbitrary attributes to the options using hashes: