diff --git a/ruoyi-generator/src/main/resources/mapper/generator/GenTableMapper.xml b/ruoyi-generator/src/main/resources/mapper/generator/GenTableMapper.xml
index 675cd0cfd..9a9d42348 100644
--- a/ruoyi-generator/src/main/resources/mapper/generator/GenTableMapper.xml
+++ b/ruoyi-generator/src/main/resources/mapper/generator/GenTableMapper.xml
@@ -80,7 +80,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 		select table_name, table_comment, create_time, update_time from information_schema.tables
 		where table_schema = (select database())
 		AND table_name NOT LIKE 'qrtz\_%' AND table_name NOT LIKE 'gen\_%'
-		AND table_name NOT IN (select table_name from gen_table)
+		AND table_name NOT IN (SELECT CAST(IFNULL((SELECT table_name FROM gen_table), '') AS CHAR) AS table_name)
 		<if test="tableName != null and tableName != ''">
 			AND lower(table_name) like lower(concat('%', #{tableName}, '%'))
 		</if>