diff --git a/ChangeLog b/ChangeLog
index 8b6979e8e5..b85d56e83e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sun Aug 22 09:08:02 2010  Tanaka Akira  <akr@fsij.org>
+
+	* include/ruby/ruby.h (UINT2NUM): fix ifdef condition for LLP64.
+	  reported by Daniel Gutmanas.  [ruby-core:31778]
+
 Sun Aug 22 06:46:21 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* array.c (RAND_UPTO): macro for random number.
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index 72fe91a9e8..028f4e9336 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -952,7 +952,7 @@ struct RBignum {
 #define OBJ_FROZEN(x) (!!FL_TEST((x), FL_FREEZE))
 #define OBJ_FREEZE(x) FL_SET((x), FL_FREEZE)
 
-#if SIZEOF_INT < SIZEOF_VALUE
+#if SIZEOF_INT < SIZEOF_LONG
 # define INT2NUM(v) INT2FIX((int)(v))
 # define UINT2NUM(v) LONG2FIX((unsigned int)(v))
 #else