diff --git a/FreeSql/Internal/CommonExpression.cs b/FreeSql/Internal/CommonExpression.cs
index 1f295768..c709a5a9 100644
--- a/FreeSql/Internal/CommonExpression.cs
+++ b/FreeSql/Internal/CommonExpression.cs
@@ -1695,7 +1695,7 @@ namespace FreeSql.Internal
                                 if (oper2.NodeType == ExpressionType.Parameter)
                                 {
                                     var oper2Parm = oper2 as ParameterExpression;
-                                    expStack.Push(exp2.Type.IsAbstract || exp2.Type.IsInterface ? oper2Parm : Expression.Parameter(exp2.Type, oper2Parm.Name));
+                                    expStack.Push(exp2.Type.IsAbstract || exp2.Type.IsInterface || exp2.Type.IsAssignableFrom(oper2Parm.Type) ? oper2Parm : Expression.Parameter(exp2.Type, oper2Parm.Name));
                                 }
                                 else
                                     expStack.Push(oper2);