diff --git a/rules/40-redhat.rules b/rules/40-redhat.rules
index 2b494e5..8231caa 100644
--- a/rules/40-redhat.rules
+++ b/rules/40-redhat.rules
@@ -1,3 +1,7 @@
 # do not edit this file, it will be overwritten on update
 
+# CPU hotadd request
 SUBSYSTEM=="cpu", ACTION=="add", TEST=="online", ATTR{online}=="0", ATTR{online}="1"
+
+# Memory hotadd request
+SUBSYSTEM=="memory", ACTION=="add", ATTR{state}=="offline", ATTR{state}="online"