diff --git a/include/xo/unit/bpu.hpp b/include/xo/unit/bpu.hpp
index be9da570..5256c8ed 100644
--- a/include/xo/unit/bpu.hpp
+++ b/include/xo/unit/bpu.hpp
@@ -7,7 +7,7 @@
 
 //#include "xo/indentlog/print/tag.hpp"
 #include "basis_unit.hpp"
-#include "dim_iostream.hpp"
+//#include "dim_iostream.hpp"
 
 namespace xo {
     namespace qty {
diff --git a/include/xo/unit/bpu_iostream.hpp b/include/xo/unit/bpu_iostream.hpp
index 42f55c8e..e6e78261 100644
--- a/include/xo/unit/bpu_iostream.hpp
+++ b/include/xo/unit/bpu_iostream.hpp
@@ -6,6 +6,7 @@
 #pragma once
 
 #include "bpu.hpp"
+#include "dim_iostream.hpp"
 #include "xo/ratio/ratio_iostream.hpp"
 #include "xo/indentlog/print/tag.hpp"
 #include <iostream>