diff --git a/ble/att.c b/ble/att.c
index 6d3b9e897..eeb59a515 100644
--- a/ble/att.c
+++ b/ble/att.c
@@ -38,18 +38,11 @@
 #include <string.h>
 
 #include "att.h"
-
-// from src/utils.
-#define READ_BT_16( buffer, pos) ( ((uint16_t) buffer[pos]) | (((uint16_t)buffer[pos+1]) << 8))
+#include <btstack/utils.h>
 
 // Buetooth Base UUID 00000000-0000-1000-8000-00805F9B34FB in little endian
 static const uint8_t bluetooth_base_uuid[] = { 0xfb, 0x34, 0x9b, 0x5f, 0x80, 0x00, 0x00, 0x80, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
 
-static void bt_store_16(uint8_t *buffer, uint16_t pos, uint16_t value){
-    buffer[pos++] = value;
-    buffer[pos++] = value >> 8;
-}
-
 static void hexdump2(void const *data, int size){
     int i;
     for (i=0; i<size;i++){