diff --git a/base_classes/NXreflections.nxdl.xml b/base_classes/NXreflections.nxdl.xml
index af773aa1a2..18a3ad30b2 100644
--- a/base_classes/NXreflections.nxdl.xml
+++ b/base_classes/NXreflections.nxdl.xml
@@ -7,7 +7,7 @@
 	    xmlns="http://definition.nexusformat.org/nxdl/3.1"
 	    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	    xsi:schemaLocation="http://definition.nexusformat.org/nxdl/3.1 ../nxdl.xsd"
-    version="1.0"
+    version="1.1"
     >
   <symbols>
     <symbol name="n"><doc>number of reflections</doc></symbol>