diff --git a/mt76.h b/mt76.h
index c27e6dfa..db3295c5 100644
--- a/mt76.h
+++ b/mt76.h
@@ -495,7 +495,7 @@ struct mt76_rx_status {
 	u8 rate_idx;
 	u8 nss;
 	u8 band;
-	u8 signal;
+	s8 signal;
 	u8 chains;
 	s8 chain_signal[IEEE80211_MAX_CHAINS];
 };