diff --git a/dimbuilder/DimBuilder.hpp b/dimbuilder/DimBuilder.hpp
index cb6dc54..8bee581 100644
--- a/dimbuilder/DimBuilder.hpp
+++ b/dimbuilder/DimBuilder.hpp
@@ -35,6 +35,7 @@
 #include <vector>
 
 #include <nlohmann/json.hpp>
+namespace NL = nlohmann;
 
 #include <pdal/DimUtil.hpp>