diff --git a/src/gap.h b/src/gap.h
index 09907e963..9ac54dd85 100644
--- a/src/gap.h
+++ b/src/gap.h
@@ -176,6 +176,13 @@ void gap_set_bondable_mode(int enabled);
  */
 int gap_get_bondable_mode(void);
 
+/**
+ * @brief Register filter for rejecting classic connections. Callback will return 1 accept connection, 0 on reject.
+ */
+
+void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr));
+
+
 /* Configure Secure Simple Pairing */
 
 /**
diff --git a/src/hci.c b/src/hci.c
index 932f55d3e..ad7dea58c 100644
--- a/src/hci.c
+++ b/src/hci.c
@@ -2104,6 +2104,14 @@ static void event_handler(uint8_t *packet, int size){
             break;
         case HCI_EVENT_CONNECTION_REQUEST:
             reverse_bd_addr(&packet[2], addr);
+            if (hci_stack->gap_classic_accept_callback != NULL){
+                if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){
+                    hci_stack->decline_reason = 0x0d;
+                    bd_addr_copy(hci_stack->decline_addr, addr);
+                    break;
+                }
+            } 
+
             // TODO: eval COD 8-10
             link_type = packet[11];
             log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type);
@@ -5101,6 +5109,11 @@ HCI_STATE hci_get_state(void){
     return hci_stack->state;
 }
 
+#ifdef ENABLE_CLASSIC
+void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){
+    hci_stack->gap_classic_accept_callback = accept_callback;
+}
+#endif
 
 /**
  * @brief Set callback for Bluetooth Hardware Error
diff --git a/src/hci.h b/src/hci.h
index 7a250c557..f9df0d819 100644
--- a/src/hci.h
+++ b/src/hci.h
@@ -730,6 +730,11 @@ typedef struct {
     /* callbacks for events */
     btstack_linked_list_t event_handlers;
 
+#ifdef ENABLE_CLASSIC
+    /* callback for reject classic connection */
+    int (*gap_classic_accept_callback)(bd_addr_t addr);
+#endif
+
     // hardware error callback
     void (*hardware_error_callback)(uint8_t error);
 
@@ -910,7 +915,6 @@ typedef struct {
     // address and address_type of active create connection command (ACL, SCO, LE)
     bd_addr_t      outgoing_addr;
     bd_addr_type_t outgoing_addr_type;
-
 } hci_stack_t;