diff --git a/top/addr_table/emp_payload.xml b/top/addr_table/emp_payload.xml
index f551925f1631c88c417157c8ebf35e7e4b9d14a7..15d20dcb009db551c6e412d035ca5f23fb510146 100644
--- a/top/addr_table/emp_payload.xml
+++ b/top/addr_table/emp_payload.xml
@@ -7,7 +7,7 @@
     <node id="csr" address="0x00004" description="Histogram control and status" fwinfo="endpoint;width=2">
         <node id="windowL" address="0x0"/>
         <node id="windowH" address="0x1" mask="0x000f"/>
-        <node id="histogram_enable" address="0x1" mask="0x0010">
+        <node id="histogram_enable" address="0x1" mask="0x0010"/>
         <node id="histogram_sel" address="0x1" mask="0xffe0"/>
         <node id="histogram0" address="0x2"/>
         <node id="histogram1" address="0x3"/>