diff --git a/include/net/cfg802154.h b/include/net/cfg802154.h
index 6ea16c8..47804cd 100644
--- a/include/net/cfg802154.h
+++ b/include/net/cfg802154.h
@@ -85,7 +85,7 @@
 	u8 current_channel;
 	u8 current_page;
 	u32 channels_supported[IEEE802154_MAX_PAGE + 1];
-	s8 transmit_power;
+	s32 transmit_power;
 	struct wpan_phy_cca cca;
 
 	__le64 perm_extended_addr;