diff --git a/net-mgmt/smartctl_exporter/files/smartctl_exporter.in b/net-mgmt/smartctl_exporter/files/smartctl_exporter.in
index 5477b36f398d..f453f0a11826 100644
--- a/net-mgmt/smartctl_exporter/files/smartctl_exporter.in
+++ b/net-mgmt/smartctl_exporter/files/smartctl_exporter.in
@@ -1,48 +1,53 @@
 #!/bin/sh
 
 # PROVIDE: smartctl_exporter
 # REQUIRE: LOGIN
 # KEYWORD: shutdown
 #
 # Add the following lines to /etc/rc.conf.local or /etc/rc.conf
 # to enable this service:
 #
 # smartctl_exporter_enable (bool):	Set to YES to enable smartctl_exporter, default is NO
 # smartctl_exporter_user (string):	Set user to run as, default is root
 # smartctl_exporter_syslog (bool):	Set to YES to use syslog, default is NO
 #
 # Use the following variables to override smartctl_exporter's defaults:
 #
 # smartctl_exporter_listen_address (string): 	Set address to listen on, default is localhost:9633
-# smartctl_exporter_devices (string):		Shell glob (like /dev/ada[0-9]) for all devices
+# smartctl_exporter_devices (string):		Space-separated list of devices (e.g., /dev/ada0 /dev/nvme0).
+#						If not set, smartctl_exporter auto-discovers devices.
+# smartctl_exporter_device_exclude (string):	Regexp to exclude devices from auto-discovery, default is "nda"
+#						to filter out NVMe CAM devices (use nvme controller instead).
 # smartctl_exporter_log_level (string):		Only log messages with the given severity or above. One of: [debug, info, warn, error]
 # smartctl_exporter_log_format (string):	Output format of log messages. One of: [logfmt, json]
 
 . /etc/rc.subr
 
 name=smartctl_exporter
 rcvar=smartctl_exporter_enable
 
 load_rc_config $name
 
 : ${smartctl_exporter_enable:="NO"}
 : ${smartctl_exporter_user:="root"}
 : ${smartctl_exporter_listen_address:="localhost:9633"}
-: ${smartctl_exporter_devices:="$(geom disk status -s | grep -vE 'cd[0-9]' | awk '{print $1;}' | sed -e s,^,/dev/,g)"}
+: ${smartctl_exporter_devices:=""}
+: ${smartctl_exporter_device_exclude:="nda"}
 : ${smartctl_exporter_log_level:=""}
 : ${smartctl_exporter_log_format:=""}
 
 pidfile=/var/run/smartctl_exporter.pid
 command=/usr/sbin/daemon
 command_args="-c -f -P ${pidfile} \
 	${smartctl_exporter_user:+-u "${smartctl_exporter_user}"} \
 	${smartctl_exporter_syslog:+-S} \
 	${smartctl_exporter_daemon} \
 	%%PREFIX%%/libexec/smartctl_exporter \
 	${smartctl_exporter_listen_address:+--web.listen-address="${smartctl_exporter_listen_address}"} \
 	${smartctl_exporter_devices:+$(for diskdev in $(echo "${smartctl_exporter_devices}"); do echo --smartctl.device="${diskdev}"; done | xargs )} \
+	${smartctl_exporter_device_exclude:+--smartctl.device-exclude="${smartctl_exporter_device_exclude}"} \
 	${smartctl_exporter_log_level:+--log.level="${smartctl_exporter_log_level}"} \
 	${smartctl_exporter_log_format:+--log.format="${smartctl_exporter_log_format}"} \
 	${smartctl_exporter_args}"
 
 run_rc_command "$1"