diff --git a/src/ble/att_db.h b/src/ble/att_db.h
index e969b2947..13fc3c20f 100644
--- a/src/ble/att_db.h
+++ b/src/ble/att_db.h
@@ -166,11 +166,12 @@ typedef int (*att_write_callback_t)(hci_con_handle_t con_handle, uint16_t attrib
 // Read & Write Callbacks for handle range
 typedef struct att_service_handler {
     btstack_linked_item_t * item;
-    uint16_t start_handle;
-    uint16_t end_handle;
     att_read_callback_t read_callback;
     att_write_callback_t write_callback;
     btstack_packet_handler_t packet_handler;
+    uint16_t start_handle;
+    uint16_t end_handle;
+    uint8_t flags;
 } att_service_handler_t;
 
 // MARK: ATT Operations
diff --git a/src/ble/att_server.c b/src/ble/att_server.c
index 911828192..b8585716e 100644
--- a/src/ble/att_server.c
+++ b/src/ble/att_server.c
@@ -1263,6 +1263,8 @@ void att_server_register_service_handler(att_service_handler_t * handler){
         log_error("handler for range 0x%04x-0x%04x already registered", handler->start_handle, handler->end_handle);
         return;
     }
+
+    handler->flags = 0;
     btstack_linked_list_add(&service_handlers, (btstack_linked_item_t*) handler);
 }