diff --git a/ChangeLog b/ChangeLog
index 5b75b3dc94..b89393004b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Sat Feb  4 15:52:56 2006  Hirokazu Yamamoto  <ocean@m2.ccsnet.ne.jp>
+
+	* numeric.c (fix_to_s): (2**32).to_s(2) fails with exception where
+	  sizeof(int) == 4 < sizeof(long). [ruby-core:7300]
+
+	  I think the function name of rb_int2big is quite misleading.
+	  This should be "rb_long2big".
+
 Fri Feb  3 19:25:53 2006  Hirokazu Yamamoto  <ocean@m2.ccsnet.ne.jp>
 
 	* ruby.h: fixed prototype.
diff --git a/numeric.c b/numeric.c
index 3a0536e10b..10310338cf 100644
--- a/numeric.c
+++ b/numeric.c
@@ -1884,7 +1884,7 @@ fix_to_s(int argc, VALUE *argv, VALUE x)
 
     if (base == 2) {
 	/* rb_fix2str() does not handle binary */
-	return rb_big2str(rb_int2big(FIX2INT(x)), 2);
+	return rb_big2str(rb_int2big(FIX2LONG(x)), 2);
     }
     return rb_fix2str(x, base);
 }