2 files changed, 6 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index 9028a2e533..c658a8446d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Mar 22 11:36:49 2016  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* time.c (wmul): wrong condition.
+	  fixed many test failures on 32bit and LLP64 platforms.
+
 Tue Mar 22 10:31:34 2016  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* time.c (wdiv, wmod): wdivmod0() assumes the 3rd and the 4th arguments
diff --git a/time.c b/time.c
index 11602bf8cc..ea71e35434 100644
--- a/time.c
+++ b/time.c
@@ -367,7 +367,7 @@ wmul(wideval_t wx, wideval_t wy)
 {
 #if WIDEVALUE_IS_WIDER
     if (FIXWV_P(wx) && FIXWV_P(wy)) {
-	if (MUL_OVERFLOW_FIXWV_P(FIXWV2WINT(wx), FIXWV2WINT(wy)))
+	if (!MUL_OVERFLOW_FIXWV_P(FIXWV2WINT(wx), FIXWV2WINT(wy)))
 	    return WINT2WV(FIXWV2WINT(wx) * FIXWV2WINT(wy));
     }
 #endif