diff --git a/activesupport/lib/active_support/core_ext/symbol.rb b/activesupport/lib/active_support/core_ext/symbol.rb
index 434d6abdbb..3a412f647b 100644
--- a/activesupport/lib/active_support/core_ext/symbol.rb
+++ b/activesupport/lib/active_support/core_ext/symbol.rb
@@ -1,5 +1,5 @@
 class Symbol
-  # Turns the symbol into a simpel proc, which is especially useful for enumerations. Examples:
+  # Turns the symbol into a simple proc, which is especially useful for enumerations. Examples:
   #
   #   # The same as people.collect { |p| p.name }
   #   people.collect(&:name)