diff --git a/src/rfcomm.c b/src/rfcomm.c
index 40ca5036e..ec73951f1 100644
--- a/src/rfcomm.c
+++ b/src/rfcomm.c
@@ -1621,7 +1621,7 @@ void rfcomm_register_packet_handler(void (*handler)(void * connection, uint8_t p
 }
 
 // send packet over specific channel
-int rfcomm_send_internal(uint8_t rfcomm_cid, uint8_t *data, uint16_t len){
+int rfcomm_send_internal(uint16_t rfcomm_cid, uint8_t *data, uint16_t len){
 
     rfcomm_channel_t * channel = rfcomm_channel_for_rfcomm_cid(rfcomm_cid);
     if (!channel){
diff --git a/src/rfcomm.h b/src/rfcomm.h
index 725014d35..39bddf23e 100644
--- a/src/rfcomm.h
+++ b/src/rfcomm.h
@@ -59,7 +59,7 @@ void rfcomm_unregister_service_internal(uint8_t service_channel);
 void rfcomm_accept_connection_internal(uint16_t rfcomm_cid);
 void rfcomm_decline_connection_internal(uint16_t rfcomm_cid);
 void rfcomm_grant_credits(uint16_t rfcomm_cid, uint8_t credits);
-int  rfcomm_send_internal(uint8_t rfcomm_cid, uint8_t *data, uint16_t len);
+int  rfcomm_send_internal(uint16_t rfcomm_cid, uint8_t *data, uint16_t len);
 void rfcomm_close_connection(void *connection);
 
 #define UNLIMITED_INCOMING_CREDITS 0xff