diff --git a/platform/daemon/src/daemon.c b/platform/daemon/src/daemon.c
index 3348ce239..acd42c1ba 100644
--- a/platform/daemon/src/daemon.c
+++ b/platform/daemon/src/daemon.c
@@ -1957,10 +1957,10 @@ int main (int argc,  char * const * argv){
         hci_transport_config_uart.baudrate_init = 0;
         transport = hci_transport_h4_iphone_instance();
     } else {
-        transport = hci_transport_h4_instance();
+        transport = hci_transport_h4_posix_instance();
     }
 #else
-    transport = hci_transport_h4_instance();
+    transport = hci_transport_h4_posix_instance();
 #endif
     config = &hci_transport_config_uart;
 #endif
diff --git a/platform/posix/src/hci_transport_h4_posix.c b/platform/posix/src/hci_transport_h4_posix.c
index d18dc6cec..82e6bce97 100644
--- a/platform/posix/src/hci_transport_h4_posix.c
+++ b/platform/posix/src/hci_transport_h4_posix.c
@@ -331,7 +331,7 @@ static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){
 }
 
 // get h4 singleton
-hci_transport_t * hci_transport_h4_instance() {
+hci_transport_t * hci_transport_h4_posix_instance() {
     if (hci_transport_h4 == NULL) {
         hci_transport_h4 = (hci_transport_h4_t*)malloc( sizeof(hci_transport_h4_t));
         hci_transport_h4->ds                                      = NULL;
diff --git a/port/daemon/src/Makefile.in b/port/daemon/src/Makefile.in
index b0533f253..da1728241 100644
--- a/port/daemon/src/Makefile.in
+++ b/port/daemon/src/Makefile.in
@@ -38,7 +38,7 @@ libBTstack_SOURCES =    \
 			  
 BTdaemon_SOURCES =      \
     daemon.c            \
-    hci_transport_h4.c  \
+    hci_transport_h4_posix.c  \
     $(libBTstack_SOURCES) \
     btstack_memory.c    \
     hci.c               \
diff --git a/port/ios/src/Makefile b/port/ios/src/Makefile
index a609c2b83..27d4d58fc 100644
--- a/port/ios/src/Makefile
+++ b/port/ios/src/Makefile
@@ -46,7 +46,7 @@ BTdaemon_FILES = \
     sdp_query_rfcomm.c      \
     sdp_query_util.c        \
 	daemon.c  				    \
-	hci_transport_h4.c 		 	\
+	hci_transport_h4_posix.c 		 	\
 	bt_control_iphone.m     	\
 	hci_transport_h4_iphone.c   \
 	platform_iphone.m       	\
diff --git a/port/mtk/hci_transport_h4_mtk.c b/port/mtk/hci_transport_h4_mtk.c
index ca0e3b795..19ca9136a 100644
--- a/port/mtk/hci_transport_h4_mtk.c
+++ b/port/mtk/hci_transport_h4_mtk.c
@@ -160,7 +160,7 @@ static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){
 }
 
 // get h4 singleton
-hci_transport_t * hci_transport_h4_instance(void){
+hci_transport_t * hci_transport_h4_posix_instance(void){
     if (hci_transport_h4 == NULL) {
         hci_transport_h4 = (hci_transport_h4_t*)malloc( sizeof(hci_transport_h4_t));
         hci_transport_h4->ds                                      = NULL;
diff --git a/port/posix-cc2564b/Makefile b/port/posix-cc2564b/Makefile
index eefbcb62e..d3152cb69 100644
--- a/port/posix-cc2564b/Makefile
+++ b/port/posix-cc2564b/Makefile
@@ -4,7 +4,7 @@ POSIX_ROOT= ${BTSTACK_ROOT}/platform/posix
 
 CORE += main.c stdin_support.c bt_control_cc256x.c bluetooth_init_cc2564B_1.2_BT_Spec_4.1.c
 
-COMMON += hci_transport_h4.c run_loop_posix.c remote_device_db_fs.c
+COMMON += hci_transport_h4_posix.c run_loop_posix.c remote_device_db_fs.c
 
 include ${BTSTACK_ROOT}/example/embedded/Makefile.inc
 
diff --git a/port/posix-cc2564b/main.c b/port/posix-cc2564b/main.c
index 19382fe84..61cd14a1f 100644
--- a/port/posix-cc2564b/main.c
+++ b/port/posix-cc2564b/main.c
@@ -104,7 +104,7 @@ int main(int argc, const char * argv[]){
     config.device_name = "/dev/tty.usbserial-AD025KU2";
 
     // init HCI
-	hci_transport_t    * transport = hci_transport_h4_instance();
+	hci_transport_t    * transport = hci_transport_h4_posix_instance();
 	bt_control_t       * control   = bt_control_cc256x_instance();
     remote_device_db_t * remote_db = (remote_device_db_t *) &remote_device_db_fs;
         
diff --git a/port/posix-h4/Makefile b/port/posix-h4/Makefile
index be75033fe..d9ba3c932 100644
--- a/port/posix-h4/Makefile
+++ b/port/posix-h4/Makefile
@@ -3,7 +3,7 @@ BTSTACK_ROOT = ../..
 
 CORE += main.c stdin_support.c
 
-COMMON += hci_transport_h4.c run_loop_posix.c remote_device_db_fs.c
+COMMON += hci_transport_h4_posix.c run_loop_posix.c remote_device_db_fs.c
 
 include ${BTSTACK_ROOT}/example/embedded/Makefile.inc
 
diff --git a/port/posix-h4/main.c b/port/posix-h4/main.c
index d09be5d57..fe6fc22de 100644
--- a/port/posix-h4/main.c
+++ b/port/posix-h4/main.c
@@ -100,7 +100,7 @@ int main(int argc, const char * argv[]){
     config.device_name = "/dev/tty.usbmodem1413";
 
     // init HCI
-	hci_transport_t    * transport = hci_transport_h4_instance();
+	hci_transport_t    * transport = hci_transport_h4_posix_instance();
     remote_device_db_t * remote_db = (remote_device_db_t *) &remote_device_db_fs;
         
 	hci_init(transport, (void*) &config, NULL, remote_db);
diff --git a/port/posix-stlc2500d/Makefile b/port/posix-stlc2500d/Makefile
index b667b5fd3..d71a8f6df 100644
--- a/port/posix-stlc2500d/Makefile
+++ b/port/posix-stlc2500d/Makefile
@@ -4,7 +4,7 @@ POSIX_ROOT= ${BTSTACK_ROOT}/platform/posix
 
 CORE += main.c stdin_support.c bt_control_stlc2500d.c
 
-COMMON += hci_transport_h4.c run_loop_posix.c remote_device_db_fs.c
+COMMON += hci_transport_h4_posix.c run_loop_posix.c remote_device_db_fs.c
 
 include ${BTSTACK_ROOT}/example/embedded/Makefile.inc
 
diff --git a/port/posix-stlc2500d/main.c b/port/posix-stlc2500d/main.c
index 9762be5a2..8734667b9 100644
--- a/port/posix-stlc2500d/main.c
+++ b/port/posix-stlc2500d/main.c
@@ -102,7 +102,7 @@ int main(int argc, const char * argv[]){
     config.device_name = "/dev/tty.usbserial-AD025KU2";
 
     // init HCI
-	hci_transport_t    * transport = hci_transport_h4_instance();
+	hci_transport_t    * transport = hci_transport_h4_posix_instance();
 	bt_control_t       * control   = bt_control_stlc2500d_instance();
     remote_device_db_t * remote_db = (remote_device_db_t *) &remote_device_db_fs;
         
diff --git a/port/posix-wl183x/Makefile b/port/posix-wl183x/Makefile
index 621aff4fe..5b9963752 100644
--- a/port/posix-wl183x/Makefile
+++ b/port/posix-wl183x/Makefile
@@ -4,7 +4,7 @@ POSIX_ROOT= ${BTSTACK_ROOT}/platform/posix
 
 CORE += main.c stdin_support.c bt_control_cc256x.c TIInit_11.8.32.c
 
-COMMON += hci_transport_h4.c run_loop_posix.c remote_device_db_fs.c
+COMMON += hci_transport_h4_posix.c run_loop_posix.c remote_device_db_fs.c
 
 include ${BTSTACK_ROOT}/example/embedded/Makefile.inc
 
diff --git a/port/posix-wl183x/main.c b/port/posix-wl183x/main.c
index bbc209124..6bcde8520 100644
--- a/port/posix-wl183x/main.c
+++ b/port/posix-wl183x/main.c
@@ -103,7 +103,7 @@ int main(int argc, const char * argv[]){
     config.device_name = "/dev/tty.usbserial-AD025KU2";
 
     // init HCI
-	hci_transport_t    * transport = hci_transport_h4_instance();
+	hci_transport_t    * transport = hci_transport_h4_posix_instance();
 	bt_control_t       * control   = bt_control_cc256x_instance();
     remote_device_db_t * remote_db = (remote_device_db_t *) &remote_device_db_fs;
         
diff --git a/src/hci_transport.h b/src/hci_transport.h
index 17ecb4a63..25445e8f2 100644
--- a/src/hci_transport.h
+++ b/src/hci_transport.h
@@ -91,7 +91,7 @@ typedef struct {
 /*
  * @brief
  */
-extern hci_transport_t * hci_transport_h4_instance(void);
+extern hci_transport_t * hci_transport_h4_posix_instance(void);
 
 /*
  * @brief
@@ -106,17 +106,13 @@ extern hci_transport_t * hci_transport_h4_iphone_instance(void);
 /*
  * @brief
  */
-extern hci_transport_t * hci_transport_h5_instance(void);
+extern hci_transport_t * hci_transport_h4_wiced_instance();
 
 /*
  * @brief
  */
 extern hci_transport_t * hci_transport_usb_instance(void);
 
-/*
- * @brief
- */
-extern hci_transport_t * hci_transport_h4_wiced_instance();
 
 /* API_END */