diff --git a/README.adoc b/README.adoc
index 9c6432c..cbeef99 100644
--- a/README.adoc
+++ b/README.adoc
@@ -518,7 +518,7 @@ end
 
 === Read Attribute [[read-attribute]]
 
-Prefer `self[:attribute]` over `read_attribute(:attribute)`.
+Prefer `self[:attribute]` over `read_attribute(:attribute)`. The former raises an `ActiveModel::MissingAttributeError` if the attribute is missing, whereas the latter does not.
 
 [source,ruby]
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