diff --git a/ChangeLog b/ChangeLog
index e896abe61f..3632478ce5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Tue Nov 20 20:33:32 2007  Koichi Sasada  <ko1@atdot.net>
+
+	* include/ruby/ruby.h: rename RFloat#double_value -> float_value.
+
+	* numeric.c, parse.y: ditto.
+
 Tue Nov 20 19:36:21 2007  Koichi Sasada  <ko1@atdot.net>
 
 	* gc.h, vm_core.h: decl of rb_gc_save_machine_context()
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index 384f7f4f5a..fd8e9a6064 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -451,9 +451,9 @@ struct RClass {
 
 struct RFloat {
     struct RBasic basic;
-    double double_value;
+    double float_value;
 };
-#define RFLOAT_VALUE(v) (RFLOAT(v)->double_value)
+#define RFLOAT_VALUE(v) (RFLOAT(v)->float_value)
 #define DOUBLE2NUM(dbl)  rb_float_new(dbl)
 
 #define ELTS_SHARED FL_USER2
diff --git a/numeric.c b/numeric.c
index 9c3ab2a865..86b4c1d06b 100644
--- a/numeric.c
+++ b/numeric.c
@@ -483,7 +483,7 @@ rb_float_new(double d)
     NEWOBJ(flt, struct RFloat);
     OBJSETUP(flt, rb_cFloat, T_FLOAT);
 
-    flt->double_value = d;
+    flt->float_value = d;
     return (VALUE)flt;
 }
 
diff --git a/parse.y b/parse.y
index fdd17f0aa0..adae072923 100644
--- a/parse.y
+++ b/parse.y
@@ -8264,7 +8264,7 @@ negate_lit(NODE *node)
 	node->nd_lit = rb_funcall(node->nd_lit,tUMINUS,0,0);
 	break;
       case T_FLOAT:
-	RFLOAT(node->nd_lit)->double_value = -RFLOAT_VALUE(node->nd_lit);
+	RFLOAT(node->nd_lit)->float_value = -RFLOAT_VALUE(node->nd_lit);
 	break;
       default:
 	break;