diff --git a/middleman-core/lib/middleman-core/core_extensions/default_helpers.rb b/middleman-core/lib/middleman-core/core_extensions/default_helpers.rb
index c5d34a4f..51a02b58 100644
--- a/middleman-core/lib/middleman-core/core_extensions/default_helpers.rb
+++ b/middleman-core/lib/middleman-core/core_extensions/default_helpers.rb
@@ -1,3 +1,4 @@
+require "active_support/core_ext/integer/inflections"
 require 'padrino-helpers'
 
 # Built-in helpers