diff --git a/ChangeLog b/ChangeLog
index a8f2f536d8..4251d89598 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,6 @@
-Fri Apr 27 12:54:35 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Fri Apr 27 17:05:41 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* numeric.c (int_pow): bugfix of overflow detection.
 
 	* numeric.c (int_pow): rb_big_pow() may return other than Bignum.
 
diff --git a/numeric.c b/numeric.c
index 1425348a95..db847567d0 100644
--- a/numeric.c
+++ b/numeric.c
@@ -2283,7 +2283,7 @@ int_pow(long x, unsigned long y)
 	}
 	{
 	    long xz = x * z;
-	    if (xz < z || xz < x || !POSFIXABLE(xz)) {
+	    if (!POSFIXABLE(xz) || xz / x != z) {
 		goto bignum;
 	    }
 	    z = xz;