diff --git a/src/hci.h b/src/hci.h
index 963929add..84f05a1a2 100644
--- a/src/hci.h
+++ b/src/hci.h
@@ -503,7 +503,7 @@ typedef struct {
     btstack_linked_list_t   notification_requests;
     btstack_linked_list_t   indication_requests;
 
-#ifdef ENABLE_GATT_OVER_CLASSIC
+#if defined(ENABLE_GATT_OVER_CLASSIC) || defined(ENABLE_GATT_OVER_EATT)
     uint16_t                l2cap_cid;
 #endif