diff --git a/jero-boot/jero-boot-module-system/src/main/java/com/jero/modules/system/service/impl/SysRolePermissionServiceImpl.java b/jero-boot/jero-boot-module-system/src/main/java/com/jero/modules/system/service/impl/SysRolePermissionServiceImpl.java
index 08a4f7b1..b358919f 100644
--- a/jero-boot/jero-boot-module-system/src/main/java/com/jero/modules/system/service/impl/SysRolePermissionServiceImpl.java
+++ b/jero-boot/jero-boot-module-system/src/main/java/com/jero/modules/system/service/impl/SysRolePermissionServiceImpl.java
@@ -92,7 +92,7 @@ public class SysRolePermissionServiceImpl extends ServiceImpl<SysRolePermissionM
 	 */
 	private List<String> getDiff(String main,String diff){
 		if(oConvertUtils.isEmpty(diff)) {
-			return null;
+			return Collections.emptyList();
 		}
 		if(oConvertUtils.isEmpty(main)) {
 			return Arrays.asList(diff.split(","));