diff --git a/activesupport/lib/active_support/core_ext/string/output_safety.rb b/activesupport/lib/active_support/core_ext/string/output_safety.rb
index 05b39b89bf..3ae3d64fa4 100644
--- a/activesupport/lib/active_support/core_ext/string/output_safety.rb
+++ b/activesupport/lib/active_support/core_ext/string/output_safety.rb
@@ -142,7 +142,7 @@ module ActiveSupport #:nodoc:
     end
 
     UNSAFE_STRING_METHODS.each do |unsafe_method|
-      class_eval <<-EOT, __FILE__, __LINE__
+      class_eval <<-EOT, __FILE__, __LINE__ + 1
         def #{unsafe_method}(*args, &block)       # def capitalize(*args, &block)
           to_str.#{unsafe_method}(*args, &block)  #   to_str.gsub(*args, &block)
         end                                       # end