diff --git a/include/net/mac802154.h b/include/net/mac802154.h
index 2f0644c..e18e7fd 100644
--- a/include/net/mac802154.h
+++ b/include/net/mac802154.h
@@ -213,7 +213,7 @@
 	int		(*set_hw_addr_filt)(struct ieee802154_hw *hw,
 					    struct ieee802154_hw_addr_filt *filt,
 					    unsigned long changed);
-	int		(*set_txpower)(struct ieee802154_hw *hw, int db);
+	int		(*set_txpower)(struct ieee802154_hw *hw, s8 dbm);
 	int		(*set_lbt)(struct ieee802154_hw *hw, bool on);
 	int		(*set_cca_mode)(struct ieee802154_hw *hw,
 					const struct wpan_phy_cca *cca);