diff --git a/ChangeLog b/ChangeLog
index 8089e8b264..ce47deb303 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Jan 19 01:53:11 2010  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* bignum.c (bigsub_int): remove nonsense loop.
+
 Tue Jan 19 01:42:36 2010  Yusuke Endoh  <mame@tsg.ne.jp>
 
 	* parse.y (top_compstmt, top_stmts, top_stmt): prohibit BEGIN {} in
diff --git a/bignum.c b/bignum.c
index 7489ba5231..b1d3e5a685 100644
--- a/bignum.c
+++ b/bignum.c
@@ -1516,8 +1516,6 @@ bigsub_int(VALUE x, long y0)
 #if SIZEOF_BDIGITS == SIZEOF_LONG
     num = (BDIGIT_DBL_SIGNED)xds[0] - y;
     if (xn == 1 && num < 0) {
-	for (i=0; i<xn; i++) {
-	}
 	RBIGNUM_SET_SIGN(z, !RBIGNUM_SIGN(x));
 	zds[0] = (BDIGIT)-num;
 	return bignorm(z);