diff --git a/ChangeLog b/ChangeLog
index 86f9dde8cb..83e869901f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Oct 30 12:20:32 2013  Tanaka Akira  <akr@fsij.org>
+
+	* time.c (v2w): Normalize a rational value to an integer if possible.
+	  [ruby-core:58070] [Bug #9059] reported by Isaac Schwabacher.
+
 Wed Oct 30 12:08:41 2013  Masaki Matsushita  <glass.saga@gmail.com>
 
 	* array.c (rb_ary_uniq_bang): use rb_ary_modify_check() instead of
diff --git a/time.c b/time.c
index c8f15bfc97..c01ca743d5 100644
--- a/time.c
+++ b/time.c
@@ -320,6 +320,11 @@ v2w_bignum(VALUE v)
 static inline wideval_t
 v2w(VALUE v)
 {
+    if (RB_TYPE_P(v, T_RATIONAL)) {
+        if (RRATIONAL(v)->den != LONG2FIX(1))
+            return v;
+        v = RRATIONAL(v)->num;
+    }
 #if WIDEVALUE_IS_WIDER
     if (FIXNUM_P(v)) {
         return WIDEVAL_WRAP((WIDEVALUE)(SIGNED_WIDEVALUE)(long)v);