diff --git a/ChangeLog b/ChangeLog
index 450dc7e477..1809ba9c2f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+Mon Jun 23 13:10:15 2014  URABE Shyouhei  <shyouhei@ruby-lang.org>
+
+	* include/ruby/ruby.h (struct RFloat): no longer.  [Feature #9863]
+
+	* include/ruby/ruby.h (RFLOAT): ditto.
+
+	* internal.h (struct RFloat): moved here.
+
+	* internal.h (RFLOAT): ditto.
+
 Mon Jun 23 12:01:42 2014  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* lib/uri/generic.rb (check_port): allow strings for port= as
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index ff97d36b3d..284684e0d9 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -807,11 +807,6 @@ struct RClass {
 #define RMODULE_IS_REFINEMENT FL_USER3
 #define RMODULE_INCLUDED_INTO_REFINEMENT FL_USER4
 
-struct RFloat {
-    struct RBasic basic;
-    double float_value;
-};
-
 double rb_float_value(VALUE);
 VALUE rb_float_new(double);
 VALUE rb_float_new_in_heap(double);
@@ -1077,7 +1072,6 @@ struct RStruct {
 #define ROBJECT(obj) (R_CAST(RObject)(obj))
 #define RCLASS(obj)  (R_CAST(RClass)(obj))
 #define RMODULE(obj) RCLASS(obj)
-#define RFLOAT(obj)  (R_CAST(RFloat)(obj))
 #define RSTRING(obj) (R_CAST(RString)(obj))
 #define RREGEXP(obj) (R_CAST(RRegexp)(obj))
 #define RARRAY(obj)  (R_CAST(RArray)(obj))
diff --git a/internal.h b/internal.h
index 04aa693741..db4961dea4 100644
--- a/internal.h
+++ b/internal.h
@@ -420,6 +420,13 @@ struct RSymbol {
 
 #define RSYMBOL(obj) (R_CAST(RSymbol)(obj))
 
+struct RFloat {
+    struct RBasic basic;
+    double float_value;
+};
+
+#define RFLOAT(obj)  (R_CAST(RFloat)(obj))
+
 /* class.c */
 void rb_class_subclass_add(VALUE super, VALUE klass);
 void rb_class_remove_from_super_subclasses(VALUE);