diff --git a/hiomap.cpp b/hiomap.cpp
index 9c2e8cd..b42c4c1 100644
--- a/hiomap.cpp
+++ b/hiomap.cpp
@@ -854,6 +854,6 @@
         };
     registerSignalHandler(ipmi::prioMax, SIGTERM, shutdownHandler);
 
-    ipmi_register_callback(NETFUN_IBM_OEM, IPMI_CMD_HIOMAP, ctx,
+    ipmi_register_callback(ipmi::netFnOemSix, IPMI_CMD_HIOMAP, ctx,
                            openpower::flash::hiomap_dispatch, SYSTEM_INTERFACE);
 }