diff --git a/drivers/net/wireless/ath/dfs_pri_detector.c b/drivers/net/wireless/ath/dfs_pri_detector.c
index 43b60817888450555cd579b7803848054811d387..1b5ad1965607cd287ca211d2232da1cdcc8d73fc 100644
--- a/drivers/net/wireless/ath/dfs_pri_detector.c
+++ b/drivers/net/wireless/ath/dfs_pri_detector.c
@@ -390,6 +390,10 @@ static struct pri_sequence *pri_detector_add_pulse(struct pri_detector *de,
 	if ((ts - de->last_ts) < rs->max_pri_tolerance)
 		/* if delta to last pulse is too short, don't use this pulse */
 		return NULL;
+	/* radar detector spec needs chirp, but not detected */
+	if (rs->chirp && rs->chirp != event->chirp)
+		return NULL;
+
 	de->last_ts = ts;
 
 	max_updated_seq = pseq_handler_add_to_existing_seqs(de, ts);