diff --git a/ruoyi-framework/src/main/java/com/ruoyi/framework/web/service/SysLoginService.java b/ruoyi-framework/src/main/java/com/ruoyi/framework/web/service/SysLoginService.java
index 2b54743..6f8b9aa 100644
--- a/ruoyi-framework/src/main/java/com/ruoyi/framework/web/service/SysLoginService.java
+++ b/ruoyi-framework/src/main/java/com/ruoyi/framework/web/service/SysLoginService.java
@@ -17,6 +17,7 @@ import com.ruoyi.common.exception.user.CaptchaExpireException;
 import com.ruoyi.common.exception.user.UserPasswordNotMatchException;
 import com.ruoyi.common.utils.DateUtils;
 import com.ruoyi.common.utils.MessageUtils;
+import com.ruoyi.common.utils.StringUtils;
 import com.ruoyi.common.utils.ServletUtils;
 import com.ruoyi.common.utils.ip.IpUtils;
 import com.ruoyi.framework.manager.AsyncManager;
@@ -102,7 +103,7 @@ public class SysLoginService
      */
     public void validateCaptcha(String username, String code, String uuid)
     {
-        String verifyKey = Constants.CAPTCHA_CODE_KEY + uuid;
+        String verifyKey = Constants.CAPTCHA_CODE_KEY + StringUtils.nvl(uuid, "");
         String captcha = redisCache.getCacheObject(verifyKey);
         redisCache.deleteObject(verifyKey);
         if (captcha == null)