diff --git a/ChangeLog b/ChangeLog
index 6dd8aa5567..88866e64ca 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Sep 15 22:31:33 2014  Sho Hashimoto  <sho.hsmt@gmail.com>
+
+	* ext/fiddle/lib/fiddle/import.rb (Fiddle::Importer#sizeof): fix typo,
+	  SIZEOF_LONG_LON.  [Fix GH-714]
+
 Mon Sep 15 11:08:23 2014  Shota Fukumori  <her@sorah.jp>
 
 	* lib/mkmf.rb (configuration): Make CXXFLAGS customizable.
diff --git a/ext/fiddle/lib/fiddle/import.rb b/ext/fiddle/lib/fiddle/import.rb
index 8b948e8f23..ec5ee94dcf 100644
--- a/ext/fiddle/lib/fiddle/import.rb
+++ b/ext/fiddle/lib/fiddle/import.rb
@@ -112,7 +112,7 @@ module Fiddle
         when TYPE_LONG
           return SIZEOF_LONG
         when TYPE_LONG_LONG
-          return SIZEOF_LONG_LON
+          return SIZEOF_LONG_LONG
         when TYPE_FLOAT
           return SIZEOF_FLOAT
         when TYPE_DOUBLE
diff --git a/test/fiddle/test_import.rb b/test/fiddle/test_import.rb
index 62985cfcd3..d06477bfa5 100644
--- a/test/fiddle/test_import.rb
+++ b/test/fiddle/test_import.rb
@@ -65,6 +65,15 @@ module Fiddle
       assert_equal(LIBC::MyStruct.size(), LIBC.sizeof(LIBC::MyStruct.malloc()))
     end
 
+    Fiddle.constants.grep(/\ATYPE_(?!VOID\z)(.*)/) do
+      type = $&
+      size = Fiddle.const_get("SIZEOF_#{$1}")
+      name = $1.sub(/P\z/,"*").gsub(/_(?!T\z)/, " ").downcase
+      define_method("test_sizeof_#{name}") do
+        assert_equal(size, Fiddle::Importer.sizeof(name), type)
+      end
+    end
+
     def test_unsigned_result()
       d = (2 ** 31) + 1
 
diff --git a/version.h b/version.h
index 379782ee44..4cf2979696 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.1.2"
 #define RUBY_RELEASE_DATE "2014-09-15"
-#define RUBY_PATCHLEVEL 238
+#define RUBY_PATCHLEVEL 239
 
 #define RUBY_RELEASE_YEAR 2014
 #define RUBY_RELEASE_MONTH 9