diff --git a/expression/scalar_function.go b/expression/scalar_function.go
index dcf08249089ea..bbc3086ed944f 100644
--- a/expression/scalar_function.go
+++ b/expression/scalar_function.go
@@ -286,6 +286,7 @@ func (sf *ScalarFunction) Clone() Expression {
 	}
 	c.SetCharsetAndCollation(sf.CharsetAndCollation())
 	c.SetCoercibility(sf.Coercibility())
+	c.SetRepertoire(sf.Repertoire())
 	return c
 }
 
diff --git a/expression/scalar_function_test.go b/expression/scalar_function_test.go
index 66e4222dbc310..827cc63af6060 100644
--- a/expression/scalar_function_test.go
+++ b/expression/scalar_function_test.go
@@ -50,6 +50,8 @@ func TestScalarFunction(t *testing.T) {
 	require.True(t, ok)
 	require.Equal(t, "values", newSf.FuncName.O)
 	require.Equal(t, mysql.TypeLonglong, newSf.RetType.Tp)
+	require.Equal(t, sf.Coercibility(), newSf.Coercibility())
+	require.Equal(t, sf.Repertoire(), newSf.Repertoire())
 	_, ok = newSf.Function.(*builtinValuesIntSig)
 	require.True(t, ok)
 }