diff --git a/kdump.conf b/kdump.conf
index dea2e94..d4fc78b 100644
--- a/kdump.conf
+++ b/kdump.conf
@@ -11,6 +11,12 @@
 #
 # Supported options:
 #
+# auto_reset_crashkernel <yes|no>
+#           - whether to reset kernel crashkernel to new default value
+#             or not when kexec-tools updates the default crashkernel value and
+#             existing kernels using the old default kernel crashkernel value.
+#             The default value is yes.
+#
 # raw <partition>
 #           - Will dd /proc/vmcore into <partition>.
 #             Use persistent device names for partition devices,
@@ -170,6 +176,7 @@
 #ssh user@my.server.com
 #ssh user@2001:db8::1:2:3:4
 #sshkey /root/.ssh/kdump_id_rsa
+auto_reset_crashkernel yes
 path /var/crash
 core_collector makedumpfile -l --message-level 7 -d 31
 #core_collector scp
diff --git a/kdump.conf.5 b/kdump.conf.5
index 6e6cafa..e3e9900 100644
--- a/kdump.conf.5
+++ b/kdump.conf.5
@@ -26,6 +26,12 @@ understand how this configuration file affects the behavior of kdump.
 
 .SH OPTIONS
 
+.B auto_reset_crashkernel <yes|no>
+.RS
+determine whether to reset kernel crashkernel to new default value
+or not when kexec-tools updates the default crashkernel value and
+existing kernels using the old default kernel crashkernel value
+
 .B raw <partition>
 .RS
 Will dd /proc/vmcore into <partition>.  Use persistent device names for