diff --git a/components/bt/host/bluedroid/bta/dm/bta_dm_co.c b/components/bt/host/bluedroid/bta/dm/bta_dm_co.c
index caf5e6872e..c6b62f3a6f 100644
--- a/components/bt/host/bluedroid/bta/dm/bta_dm_co.c
+++ b/components/bt/host/bluedroid/bta/dm/bta_dm_co.c
@@ -356,7 +356,7 @@ void bta_dm_co_ble_io_req(BD_ADDR bd_addr,  tBTA_IO_CAP *p_io_cap,
         *p_resp_key = bte_appl_cfg.ble_resp_key;
     }
 
-    if (bte_appl_cfg.ble_max_key_size > 7 && bte_appl_cfg.ble_max_key_size <= 16) {
+    if (bte_appl_cfg.ble_max_key_size >= 7 && bte_appl_cfg.ble_max_key_size <= 16) {
         *p_max_key_size = bte_appl_cfg.ble_max_key_size;
     }
 #endif  ///SMP_INCLUDED == TRUE