diff --git a/mt7615/mac.c b/mt7615/mac.c
index a8fbf084..d1d87240 100644
--- a/mt7615/mac.c
+++ b/mt7615/mac.c
@@ -1860,7 +1860,7 @@ mt7615_mac_adjust_sensitivity(struct mt7615_phy *phy,
 	struct mt7615_dev *dev = phy->dev;
 	int false_cca = ofdm ? phy->false_cca_ofdm : phy->false_cca_cck;
 	bool ext_phy = phy != &dev->phy;
-	u16 def_th = ofdm ? -98 : -110;
+	s16 def_th = ofdm ? -98 : -110;
 	bool update = false;
 	s8 *sensitivity;
 	int signal;