diff --git a/df_datalink_sp/src/networking/phy_layer/phy_layer.h b/df_datalink_sp/src/networking/phy_layer/phy_layer.h
index f930f80..5c4faaa 100644
--- a/df_datalink_sp/src/networking/phy_layer/phy_layer.h
+++ b/df_datalink_sp/src/networking/phy_layer/phy_layer.h
@@ -186,8 +186,8 @@ typedef struct
 #ifndef EMULATION
 	uint8_t (*get_clk_state)(void);
 	uint8_t (*get_ad_lock_state)(void);
-	uint8_t (*get_ad0_temp)(void);
-	uint8_t (*get_ad1_temp)(void);
+	int8_t (*get_ad0_temp)(void);
+	int8_t (*get_ad1_temp)(void);
 #endif
 } PHY_CONFIG;