diff --git a/base_classes/NXinstrument.nxdl.xml b/base_classes/NXinstrument.nxdl.xml
index e385f3671d..249cbeda82 100644
--- a/base_classes/NXinstrument.nxdl.xml
+++ b/base_classes/NXinstrument.nxdl.xml
@@ -69,6 +69,7 @@
     <group type="NXtransformations" name="DIFFRACTOMETER" />
     <group type="NXvelocity_selector" />
     <group type="NXxraylens" />
+    <group type="NXenvironment" />
     <attribute name="default">
         <doc>
             .. index:: plotting