diff --git a/include/xo/unit/bpu_iostream.hpp b/include/xo/unit/bpu_iostream.hpp
index e6e78261..41629987 100644
--- a/include/xo/unit/bpu_iostream.hpp
+++ b/include/xo/unit/bpu_iostream.hpp
@@ -1,4 +1,4 @@
-/** @file native_bpu2_iostream.hpp
+/** @file bpu_iostream.hpp
  *
  *  Author: Roland Conybeare
  **/
@@ -27,5 +27,4 @@ namespace xo {
     } /*namespace qty*/
 } /*namespace xo*/
 
-
-/** end native_bpu2_iostream.hpp **/
+/** end bpu_iostream.hpp **/
diff --git a/include/xo/unit/quantity_concept.hpp b/include/xo/unit/quantity_concept.hpp
index 56e0d260..ec648fb1 100644
--- a/include/xo/unit/quantity_concept.hpp
+++ b/include/xo/unit/quantity_concept.hpp
@@ -1,4 +1,4 @@
-/** @file quantity2_concept.hpp **/
+/** @file quantity_concept.hpp **/
 
 #pragma once
 
@@ -24,3 +24,5 @@ namespace xo {
               && numeric_concept<typename Quantity::repr_type>);
     } /*namespace qty*/
 } /*namespace xo*/
+
+/* end quantity_concept.hpp */
diff --git a/include/xo/unit/scaled_unit.hpp b/include/xo/unit/scaled_unit.hpp
index ab9a8a94..166acc6e 100644
--- a/include/xo/unit/scaled_unit.hpp
+++ b/include/xo/unit/scaled_unit.hpp
@@ -1,4 +1,4 @@
-/** @file scaled_unit2.hpp
+/** @file scaled_unit.hpp
  *
  *  Author: Roland Conybeare
  **/
@@ -216,4 +216,4 @@ namespace xo {
     } /*namespace qty*/
 } /*namespace xo*/
 
-/** end scaled_unit2.hpp **/
+/** end scaled_unit.hpp **/
diff --git a/include/xo/unit/xquantity_iostream.hpp b/include/xo/unit/xquantity_iostream.hpp
index c79c0bb7..9798224e 100644
--- a/include/xo/unit/xquantity_iostream.hpp
+++ b/include/xo/unit/xquantity_iostream.hpp
@@ -1,4 +1,4 @@
-/** @file Quantity2_iostream.hpp
+/** @file xquantity_iostream.hpp
  *
  *  Author: Roland Conybeare
  **/
@@ -31,4 +31,4 @@ namespace xo {
     } /*namespace qty*/
 } /*namespace xo*/
 
-/** end Quantity2_iostream.hpp **/
+/** end xquantity_iostream.hpp **/