diff --git a/esp32_device/main/main.c b/esp32_device/main/main.c
index 9e7996e..0fc3759 100755
--- a/esp32_device/main/main.c
+++ b/esp32_device/main/main.c
@@ -145,7 +145,7 @@ void app_main(void)
 
     // Retrieve device certificate if missing
     ESP_LOGI(TAG, "Check device certificate");
-    if (storage_get_dev_cert(NULL) == 0)
+    if (storage_get_dev_cert(NULL) < 2)
     {
         char *dev_cert = secure_api_get_dev_certificate();
         if (!dev_cert)