diff --git a/common/usb_pd_protocol.c b/common/usb_pd_protocol.c
index 6d82557c31..e78e8f81e4 100644
--- a/common/usb_pd_protocol.c
+++ b/common/usb_pd_protocol.c
@@ -621,7 +621,7 @@ static int send_source_cap(int port)
 
 	bit_len = pd_transmit(port, TCPC_TX_SOP, header, src_pdo);
 	if (debug_level >= 2)
-		CPRINTF("srcCAP>%d\n", bit_len);
+		CPRINTS("C%d srcCAP>%d", port, bit_len);
 
 	return bit_len;
 }