diff --git a/ChangeLog b/ChangeLog
index 3599ce7b6f..0ff0224b34 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Mon May  5 00:52:18 2014  Kenta Murata  <mrkn@mrkn.jp>
+
+	* ext/bigdecimal/bigdecimal.c (BigDecimal_initialize): Insert GC guard.
+
+	* ext/bigdecimal/bigdecimal.c (BigDecimal_global_new): ditto.
+
 Mon May  5 00:42:35 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 	* ext/psych/psych.gemspec: update gemspec for psych-2.0.5
diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c
index 4120a2346d..6425a17db2 100644
--- a/ext/bigdecimal/bigdecimal.c
+++ b/ext/bigdecimal/bigdecimal.c
@@ -2456,9 +2456,11 @@ static Real *BigDecimal_new(int argc, VALUE *argv);
 static VALUE
 BigDecimal_initialize(int argc, VALUE *argv, VALUE self)
 {
+    ENTER(1);
     Real *pv = rb_check_typeddata(self, &BigDecimal_data_type);
-    Real *x = BigDecimal_new(argc, argv);
+    Real *x;
 
+    GUARD_OBJ(x, BigDecimal_new(argc, argv));
     if (ToValue(x)) {
 	pv = VpCopy(pv, x);
     }
@@ -2539,7 +2541,10 @@ BigDecimal_new(int argc, VALUE *argv)
 static VALUE
 BigDecimal_global_new(int argc, VALUE *argv, VALUE self)
 {
-    Real *pv = BigDecimal_new(argc, argv);
+    ENTER(1);
+    Real *pv;
+
+    GUARD_OBJ(pv, BigDecimal_new(argc, argv));
     if (ToValue(pv)) pv = VpCopy(NULL, pv);
     pv->obj = TypedData_Wrap_Struct(rb_cBigDecimal, &BigDecimal_data_type, pv);
     return pv->obj;
diff --git a/version.h b/version.h
index 1506ab1693..fe4bbb31ff 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.1.2"
 #define RUBY_RELEASE_DATE "2014-05-05"
-#define RUBY_PATCHLEVEL 86
+#define RUBY_PATCHLEVEL 87
 
 #define RUBY_RELEASE_YEAR 2014
 #define RUBY_RELEASE_MONTH 5