diff --git a/src/networking/phy_layer/phy_layer.c b/src/networking/phy_layer/phy_layer.c
index f347624..a3eec52 100644
--- a/src/networking/phy_layer/phy_layer.c
+++ b/src/networking/phy_layer/phy_layer.c
@@ -52,7 +52,7 @@
 #define L1_ANTCONFIG_MAX_LEN 8192 // byte
 #define L1_TXRXDATA_MAX_LEN 4096  // byte
 
-#define ANT_COINFO_LEN 32 // bytes, antenna configuration length of each hop
+#define ANT_COINFO_LEN 40 // bytes, antenna configuration length of each hop
 
 #define ATTN_DEFAULT 0
 #define ATTN_ADV_24MS ATTN_DEFAULT
diff --git a/src/networking/phy_layer/phy_layer.h b/src/networking/phy_layer/phy_layer.h
index 561599a..03da62a 100644
--- a/src/networking/phy_layer/phy_layer.h
+++ b/src/networking/phy_layer/phy_layer.h
@@ -104,7 +104,7 @@ typedef struct
 						///< RF synthesizer ping-pong frequency, 3 antennas
 						/// and 2 byte each: 0~600 MHz, step 1MHz, with base
 						/// frequency of 3700 MHz
-	uint8_t rfRsvd; 	///< reserved for further use
+	uint16_t rfRsvd; 	///< reserved for further use
 } PHY_ANT_CONFIG;
 
 /**