diff --git a/lib/aws/s3/extensions.rb b/lib/aws/s3/extensions.rb
index 2c9677f..1cc9da5 100644
--- a/lib/aws/s3/extensions.rb
+++ b/lib/aws/s3/extensions.rb
@@ -127,7 +127,7 @@ def to_header
 module Kernel
   def __method__(depth = 0)
     caller[depth][/`([^']+)'/, 1]
-  end if RUBY_VERSION < '1.8.7'
+  end if RUBY_VERSION <= '1.8.7'
   
   def __called_from__
     caller[1][/`([^']+)'/, 1]
diff --git a/test/extensions_test.rb b/test/extensions_test.rb
index 8bbe100..2ad770a 100644
--- a/test/extensions_test.rb
+++ b/test/extensions_test.rb
@@ -139,7 +139,7 @@ def test___method___depth
     assert_equal 'foo', b.foo
     assert_equal 'bar', b.bar
   end
-end if RUBY_VERSION < '1.8.7'
+end if RUBY_VERSION <= '1.8.7'
 
 class ModuleExtensionsTest < Test::Unit::TestCase
   class Foo