diff --git a/ChangeLog b/ChangeLog
index a693b4e657..88b6f34d60 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Fri Jul  4 23:12:53 2008  Masaki Suketa  <masaki.suketa@nifty.ne.jp>
+
+	* ext/win32ole/win32ole.c (d2time): fix the bug of VT_DATE 
+	  to String conversion when negative value.
+	  
+	* test/win32ole/test_win32ole_variant.rb: ditto.
+
 Fri Jul  4 22:15:29 2008  Tanaka Akira  <akr@fsij.org>
 
 	* lib/test/unit/testcase.rb: collect decendants of
diff --git a/ext/win32ole/win32ole.c b/ext/win32ole/win32ole.c
index ea027c153a..a972c8bc68 100644
--- a/ext/win32ole/win32ole.c
+++ b/ext/win32ole/win32ole.c
@@ -24,6 +24,7 @@
 #include <olectl.h>
 #include <ole2.h>
 #include <stdlib.h>
+#include <math.h>
 #ifdef HAVE_STDARG_PROTOTYPES
 #include <stdarg.h>
 #define va_init_list(a,b) va_start(a,b)
@@ -117,7 +118,7 @@
 
 #define WC2VSTR(x) ole_wc2vstr((x), TRUE)
 
-#define WIN32OLE_VERSION "1.1.8"
+#define WIN32OLE_VERSION "1.1.9"
 
 typedef HRESULT (STDAPICALLTYPE FNCOCREATEINSTANCEEX)
     (REFCLSID, IUnknown*, DWORD, COSERVERINFO*, DWORD, MULTI_QI*);
@@ -763,7 +764,7 @@ d2time(double v, int *hh, int *mm, int *ss)
     double d_hh, d_mm, d_ss;
     int    i_hh, i_mm, i_ss;
 
-    double d = v * 86400.0;
+    double d = fabs(v * 86400.0);
 
     d_hh = d / 3600.0;
     i_hh = (int)d_hh;
diff --git a/test/win32ole/test_win32ole_variant.rb b/test/win32ole/test_win32ole_variant.rb
index ddce062820..1226e0de50 100644
--- a/test/win32ole/test_win32ole_variant.rb
+++ b/test/win32ole/test_win32ole_variant.rb
@@ -540,6 +540,44 @@ if defined?(WIN32OLE_VARIANT)
       }
     end
 
+    def test_conversion_vt_date
+      obj = WIN32OLE_VARIANT.new(-657434, WIN32OLE::VARIANT::VT_DATE)
+      assert_equal("0100/01/01 00:00:00", obj.value)
+
+      obj = WIN32OLE_VARIANT.new("1500/12/29 23:59:59", WIN32OLE::VARIANT::VT_DATE)
+      assert_equal("1500/12/29 23:59:59", obj.value)
+
+      obj = WIN32OLE_VARIANT.new("1500/12/30 00:00:00", WIN32OLE::VARIANT::VT_DATE)
+      assert_equal("1500/12/30 00:00:00", obj.value)
+
+      obj = WIN32OLE_VARIANT.new("1500/12/30 00:00:01", WIN32OLE::VARIANT::VT_DATE)
+      assert_equal("1500/12/30 00:00:01", obj.value)
+
+      obj = WIN32OLE_VARIANT.new("1899/12/29 23:59:59", WIN32OLE::VARIANT::VT_DATE)
+      assert_equal("1899/12/29 23:59:59", obj.value)
+
+      obj = WIN32OLE_VARIANT.new("1899/12/30 00:00:00", WIN32OLE::VARIANT::VT_DATE)
+      assert_equal("1899/12/30 00:00:00", obj.value)
+
+      obj = WIN32OLE_VARIANT.new("1899/12/30 00:00:01", WIN32OLE::VARIANT::VT_DATE)
+      assert_equal("1899/12/30 00:00:01", obj.value)
+
+      obj = WIN32OLE_VARIANT.new(0, WIN32OLE::VARIANT::VT_DATE)
+      assert_equal("1899/12/30 00:00:00", obj.value)
+
+      obj = WIN32OLE_VARIANT.new("2008/12/29 23:59:59", WIN32OLE::VARIANT::VT_DATE)
+      assert_equal("2008/12/29 23:59:59", obj.value)
+
+      obj = WIN32OLE_VARIANT.new("2008/12/30 00:00:00", WIN32OLE::VARIANT::VT_DATE)
+      assert_equal("2008/12/30 00:00:00", obj.value)
+
+      obj = WIN32OLE_VARIANT.new("2008/12/30 00:00:01", WIN32OLE::VARIANT::VT_DATE)
+      assert_equal("2008/12/30 00:00:01", obj.value)
+
+      obj = WIN32OLE_VARIANT.new("9999/12/31 23:59:59", WIN32OLE::VARIANT::VT_DATE)
+      assert_equal("9999/12/31 23:59:59", obj.value)
+    end
+
     def test_create_nil_dispatch
       var = WIN32OLE_VARIANT.new(nil, WIN32OLE::VARIANT::VT_DISPATCH)
       assert_nil(var.value)