diff --git a/include/xo/unit/dimension_impl.hpp b/include/xo/unit/dimension_impl.hpp
index 49262655..7a8e7aff 100644
--- a/include/xo/unit/dimension_impl.hpp
+++ b/include/xo/unit/dimension_impl.hpp
@@ -6,7 +6,7 @@
 #include "native_bpu.hpp"
 #include "dim_util.hpp"
 #include "ratio_util.hpp"
-#include <json/value.h>
+//#include <json/value.h>
 #include <ratio>
 #include <algorithm>
 #include <numeric>