diff --git a/components/bt/esp_ble_mesh/mesh_core/provisioner_main.c b/components/bt/esp_ble_mesh/mesh_core/provisioner_main.c
index f84fcd491..658aa3264 100644
--- a/components/bt/esp_ble_mesh/mesh_core/provisioner_main.c
+++ b/components/bt/esp_ble_mesh/mesh_core/provisioner_main.c
@@ -1384,7 +1384,7 @@ int bt_mesh_provisioner_local_net_key_delete(u16_t net_idx)
             /* Delete any app keys bound to this NetKey index */
             for (j = 0; j < ARRAY_SIZE(bt_mesh.p_app_keys); j++) {
                 struct bt_mesh_app_key *key = bt_mesh.p_app_keys[j];
-                if (key->net_idx == sub->net_idx) {
+                if (key && key->net_idx == sub->net_idx) {
                     bt_mesh_provisioner_local_app_key_delete(key->net_idx, key->app_idx);
                 }
             }