diff --git a/platform/daemon/src/daemon.c b/platform/daemon/src/daemon.c
index 4a3fcb69c..6420943e6 100644
--- a/platform/daemon/src/daemon.c
+++ b/platform/daemon/src/daemon.c
@@ -478,7 +478,7 @@ static void daemon_l2cap_close_connection(client_state_t * daemon_client){
     linked_list_iterator_init(&it, l2cap_psms);
     while (linked_list_iterator_has_next(&it)){
         linked_list_uint32_t * item = (linked_list_uint32_t*) linked_list_iterator_next(&it);
-        l2cap_unregister_service_internal(NULL, item->value);
+        l2cap_unregister_service(item->value);
         linked_list_remove(l2cap_psms, (linked_item_t *) item);
         free(item);
     }
@@ -840,7 +840,7 @@ static int btstack_command_handler(connection_t *connection, uint8_t *packet, ui
         case L2CAP_UNREGISTER_SERVICE:
             psm = READ_BT_16(packet, 3);
             daemon_remove_client_l2cap_service(connection, psm);
-            l2cap_unregister_service_internal(connection, psm);
+            l2cap_unregister_service(psm);
             break;
         case L2CAP_ACCEPT_CONNECTION:
             cid    = READ_BT_16(packet, 3);
diff --git a/src/classic/bnep.c b/src/classic/bnep.c
index fd001e3c7..96aaa1af9 100644
--- a/src/classic/bnep.c
+++ b/src/classic/bnep.c
@@ -1643,6 +1643,6 @@ void bnep_unregister_service(uint16_t service_uuid)
     btstack_memory_bnep_service_free(service);
     service = NULL;
     
-    l2cap_unregister_service_internal(NULL, PSM_BNEP);
+    l2cap_unregister_service(PSM_BNEP);
 }
 
diff --git a/src/classic/rfcomm.c b/src/classic/rfcomm.c
index ae0ba16c4..110fb7514 100644
--- a/src/classic/rfcomm.c
+++ b/src/classic/rfcomm.c
@@ -2293,7 +2293,7 @@ void rfcomm_unregister_service_internal(uint8_t service_channel){
     // unregister if no services active
     if (linked_list_empty(&rfcomm_services)){
         // bt_send_cmd(&l2cap_unregister_service, PSM_RFCOMM);
-        l2cap_unregister_service_internal(NULL, PSM_RFCOMM);
+        l2cap_unregister_service(PSM_RFCOMM);
     }
 }
 
diff --git a/src/l2cap.c b/src/l2cap.c
index 7972d1e64..f78c04cb3 100644
--- a/src/l2cap.c
+++ b/src/l2cap.c
@@ -1560,7 +1560,7 @@ uint8_t l2cap_register_service(btstack_packet_handler_t service_packet_handler,
     return 0;
 }
 
-void l2cap_unregister_service_internal(void *connection, uint16_t psm){
+void l2cap_unregister_service(uint16_t psm){
     
     log_info("L2CAP_UNREGISTER_SERVICE psm 0x%x", psm);
 
diff --git a/src/l2cap.h b/src/l2cap.h
index ce3399c76..ce9765ab8 100644
--- a/src/l2cap.h
+++ b/src/l2cap.h
@@ -295,13 +295,6 @@ int  l2cap_send_connectionless(uint16_t handle, uint16_t cid, uint8_t *data, uin
 
 /* API_END */
 
-// deprecated...
-
-/** 
- * @brief Unregisters L2CAP service with given PSM.  On embedded systems, use NULL for connection parameter.
- */
-void l2cap_unregister_service_internal(void * connection, uint16_t psm);
-
 #if 0
 
 // to be implemented soon