diff --git a/ChangeLog b/ChangeLog
index bfe8e79791..2cd878e3f9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Mar  9 06:00:37 2015  Koichi Sasada  <ko1@atdot.net>
+
+	* vm_insnhelper.h (COPY_CREF_OMOD): fix translation miss.
+
 Mon Mar  9 04:47:58 2015  Koichi Sasada  <ko1@atdot.net>
 
 	* internal.h: define CREF accessor macros.
diff --git a/vm_insnhelper.h b/vm_insnhelper.h
index 6cbf8b6fa9..20edcc62e7 100644
--- a/vm_insnhelper.h
+++ b/vm_insnhelper.h
@@ -147,7 +147,7 @@ enum vm_regan_acttype {
 
 #define COPY_CREF_OMOD(c1, c2) do {  \
   RB_OBJ_WRITE((c1), &CREF_REFINEMENTS(c1), CREF_REFINEMENTS(c2)); \
-  if (!CREF_REFINEMENTS(c2)) { \
+  if (!NIL_P(CREF_REFINEMENTS(c2))) { \
       CREF_OMOD_SHARED_SET(c1); \
       CREF_OMOD_SHARED_SET(c2); \
   } \