diff --git a/kdump.sysconfig.s390x b/kdump.sysconfig.s390x
index b55515a..848b043 100644
--- a/kdump.sysconfig.s390x
+++ b/kdump.sysconfig.s390x
@@ -16,7 +16,7 @@ KDUMP_COMMANDLINE=""
 
 # This variable lets us append arguments to the current kdump commandline
 # As taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
-KDUMP_COMMANDLINE_APPEND="maxcpus=1 cgroup_disable=memory numa=off udev.children-max=2 panic=10 rootflags=nofail"
+KDUMP_COMMANDLINE_APPEND="nr_cpus=1 cgroup_disable=memory numa=off udev.children-max=2 panic=10 rootflags=nofail"
 
 # Any additional /sbin/mkdumprd arguments required.
 MKDUMPRD_ARGS=""