diff --git a/src/main/java/io/jboot/db/model/JbootModel.java b/src/main/java/io/jboot/db/model/JbootModel.java
index 47e3ba343e20dceb75d430fd66357bb513e4e68c..f27e7d6123c14e306dc6172533a92b16fdcf72a5 100644
--- a/src/main/java/io/jboot/db/model/JbootModel.java
+++ b/src/main/java/io/jboot/db/model/JbootModel.java
@@ -771,7 +771,10 @@ public class JbootModel<M extends JbootModel<M>> extends Model<M> {
     public List<M> findListByColumns(Columns columns, String orderBy,Integer start, Integer count, String loadColumns) {
         processColumns(columns, "findList");
         loadColumns = getLoadColumns(loadColumns);
-        String limitStr = buildLimitStr(start, count);
+        String limitStr = null;
+        if(null != count){
+            limitStr = buildLimitStr(start, count);
+        }
         String sql = _getDialect().forFindByColumns(alias, joins, _getTableName(), loadColumns, columns.getList(), orderBy, limitStr);
         return columns.isEmpty() ? find(sql) : find(sql, columns.getValueArray());
     }