diff --git a/guides/source/active_support_instrumentation.md b/guides/source/active_support_instrumentation.md
index b1ab700f59dbe2dfdb0f5daad710dfcec6c613bc..69421e687654b573b900c056886833aa0543d9ec 100644
--- a/guides/source/active_support_instrumentation.md
+++ b/guides/source/active_support_instrumentation.md
@@ -465,7 +465,7 @@ Creating custom events
 Adding your own events is easy as well. `ActiveSupport::Notifications` will take care of
 all the heavy lifting for you. Simply call `instrument` with a `name`, `payload` and a block.
 The notification will be sent after the block returns. `ActiveSupport` will generate the start and end times
-as well as the unique ID. All data passed into the `insturment` call will make it into the payload.
+as well as the unique ID. All data passed into the `instrument` call will make it into the payload.
 
 Here's an example:
 
diff --git a/guides/source/form_helpers.md b/guides/source/form_helpers.md
index dd641c2e292770c5604dbd985e26df21543a4bda..4e935442cc8b2bc0ea2d6d77aa1f6bb395b17c8b 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: