diff --git a/rsync_tmbackup.sh b/rsync_tmbackup.sh
index 3a634f8..a8723e7 100755
--- a/rsync_tmbackup.sh
+++ b/rsync_tmbackup.sh
@@ -370,6 +370,12 @@ if [ -n "$(fn_find "$INPROGRESS_FILE")" ]; then
 			fn_log_error "Previous backup task is still active - aborting (command: $RUNNINGCMD)."
 			exit 1
 		fi
+	elif [[ "$OSTYPE" == "netbsd"* ]]; then
+		RUNNINGPID="$(fn_run_cmd "cat $INPROGRESS_FILE")"
+		if ps -axp "$RUNNINGPID" -o "command" | grep "$APPNAME" > /dev/null; then
+                        fn_log_error "Previous backup task is still active - aborting."
+                        exit 1
+                fi
 	else
 		RUNNINGPID="$(fn_run_cmd "cat $INPROGRESS_FILE")"
 		if [ "$RUNNINGPID" = "$(pgrep -o -f "$APPNAME")" ]; then