diff --git a/dump/dump.go b/dump/dump.go
index 4e9320cf9..2c74462e6 100644
--- a/dump/dump.go
+++ b/dump/dump.go
@@ -3,6 +3,7 @@ package dump
 
 import (
 	"bytes"
+	"fmt"
 	"io"
 	"os"
 	"reflect"
@@ -43,6 +44,9 @@ var (
 		opts.Output = os.Stdout
 		opts.ShowFlag = Fnopos
 	})
+
+	// some type init
+	stringerType = reflect.TypeOf((*fmt.Stringer)(nil)).Elem()
 )
 
 // Theme color code/tag map for dump
diff --git a/dump/dumper.go b/dump/dumper.go
index 262dd727a..b0eb66a6e 100644
--- a/dump/dumper.go
+++ b/dump/dumper.go
@@ -236,11 +236,11 @@ func (d *Dumper) printRValue(t reflect.Type, v reflect.Value) {
 	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
 		intStr := strconv.FormatInt(v.Int(), 10)
 		intStr = d.ColorTheme.integer(intStr)
-		d.printf("%s(%s),%s\n", t.String(), intStr, d.rvStringer(v))
+		d.printf("%s(%s),%s\n", t.String(), intStr, d.rvStringer(t, v))
 	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
 		intStr := strconv.FormatUint(v.Uint(), 10)
 		intStr = d.ColorTheme.integer(intStr)
-		d.printf("%s(%s),%s\n", t.String(), intStr, d.rvStringer(v))
+		d.printf("%s(%s),%s\n", t.String(), intStr, d.rvStringer(t, v))
 	case reflect.String:
 		strVal := d.ColorTheme.string(v.String())
 		lenTip := d.ColorTheme.valTip("#len=" + strconv.Itoa(v.Len()))
@@ -395,10 +395,10 @@ func (d *Dumper) checkCyclicRef(t reflect.Type, v reflect.Value) (goon bool) {
 	return true
 }
 
-func (d *Dumper) rvStringer(rv reflect.Value) string {
-	val := rv.Interface()
-	if s, ok := val.(fmt.Stringer); ok {
-		return d.ColorTheme.valTip(` #str: "` + s.String() + `"`)
+func (d *Dumper) rvStringer(rt reflect.Type, rv reflect.Value) string {
+	// fmt.Println("Implements fmt.Stringer:", t.Implements(stringerType))
+	if rv.CanInterface() && rt.Implements(stringerType) {
+		return d.ColorTheme.valTip(` #str: "` + rv.Interface().(fmt.Stringer).String() + `"`)
 	}
 	return ""
 }
diff --git a/dump/dumper_test.go b/dump/dumper_test.go
index 283b9311d..2d917d451 100644
--- a/dump/dumper_test.go
+++ b/dump/dumper_test.go
@@ -3,6 +3,7 @@ package dump
 import (
 	"bytes"
 	"fmt"
+	"io/fs"
 	"os"
 	"reflect"
 	"testing"
@@ -419,3 +420,26 @@ func TestStruct_WithNested(t *testing.T) {
 	//  Github: string("https://github.com/inhere"),
 	// }
 }
+
+func TestDumper_Dump_userType(t *testing.T) {
+	type testSt struct {
+		name string
+		mod  fs.FileMode
+		Mod2 fs.FileMode
+		Age  int
+	}
+
+	st := testSt{
+		name: "inhere",
+		mod:  0777,
+		Mod2: 0775,
+		Age:  23,
+	}
+
+	fmt.Println("------ use dumper ------")
+	P(st)
+	fmt.Println("------ use fmt.Println ------")
+	fmt.Println(st)
+	fmt.Println("------ use fmt.Printf ------")
+	fmt.Printf("%+v\n", st)
+}