diff --git a/drivers/hwtracing/coresight/coresight-cti-platform.c b/drivers/hwtracing/coresight/coresight-cti-platform.c
index 4eff96f48594..d6d5388705c3 100644
--- a/drivers/hwtracing/coresight/coresight-cti-platform.c
+++ b/drivers/hwtracing/coresight/coresight-cti-platform.c
@@ -329,6 +329,7 @@ static int cti_plat_process_filter_sigs(struct cti_drvdata *drvdata,
 	if (!tg)
 		return -ENOMEM;
 
+	tg->nr_sigs = nr_filter_sigs;
 	err = cti_plat_read_trig_group(tg, fwnode, CTI_DT_FILTER_OUT_SIGS);
 	if (!err)
 		drvdata->config.trig_out_filter |= tg->used_mask;