diff --git a/core/logx/richlogger.go b/core/logx/richlogger.go
index 6f2a826d..0357e397 100644
--- a/core/logx/richlogger.go
+++ b/core/logx/richlogger.go
@@ -65,7 +65,7 @@ func (l *richLogger) Errorf(format string, v ...any) {
 }
 
 func (l *richLogger) Errorv(v any) {
-	l.err(fmt.Sprint(v))
+	l.err(v)
 }
 
 func (l *richLogger) Errorw(msg string, fields ...LogField) {
diff --git a/core/logx/richlogger_test.go b/core/logx/richlogger_test.go
index b629c537..11f7dfcb 100644
--- a/core/logx/richlogger_test.go
+++ b/core/logx/richlogger_test.go
@@ -66,6 +66,9 @@ func TestTraceDebug(t *testing.T) {
 	l.WithDuration(time.Second).Debugv(testlog)
 	validate(t, w.String(), true, true)
 	w.Reset()
+	l.WithDuration(time.Second).Debugv(testobj)
+	validateContentType(t, w.String(), map[string]any{}, true, true)
+	w.Reset()
 	l.WithDuration(time.Second).Debugw(testlog, Field("foo", "bar"))
 	validate(t, w.String(), true, true)
 	assert.True(t, strings.Contains(w.String(), "foo"), w.String())
@@ -103,6 +106,9 @@ func TestTraceError(t *testing.T) {
 	l.WithDuration(time.Second).Errorv(testlog)
 	validate(t, w.String(), true, true)
 	w.Reset()
+	l.WithDuration(time.Second).Errorv(testobj)
+	validateContentType(t, w.String(), map[string]any{}, true, true)
+	w.Reset()
 	l.WithDuration(time.Second).Errorw(testlog, Field("basket", "ball"))
 	validate(t, w.String(), true, true)
 	assert.True(t, strings.Contains(w.String(), "basket"), w.String())
@@ -137,6 +143,9 @@ func TestTraceInfo(t *testing.T) {
 	l.WithDuration(time.Second).Infov(testlog)
 	validate(t, w.String(), true, true)
 	w.Reset()
+	l.WithDuration(time.Second).Infov(testobj)
+	validateContentType(t, w.String(), map[string]any{}, true, true)
+	w.Reset()
 	l.WithDuration(time.Second).Infow(testlog, Field("basket", "ball"))
 	validate(t, w.String(), true, true)
 	assert.True(t, strings.Contains(w.String(), "basket"), w.String())
@@ -173,6 +182,9 @@ func TestTraceInfoConsole(t *testing.T) {
 	w.Reset()
 	l.WithDuration(time.Second).Infov(testlog)
 	validate(t, w.String(), true, true)
+	w.Reset()
+	l.WithDuration(time.Second).Infov(testobj)
+	validateContentType(t, w.String(), map[string]any{}, true, true)
 }
 
 func TestTraceSlow(t *testing.T) {
@@ -204,6 +216,9 @@ func TestTraceSlow(t *testing.T) {
 	l.WithDuration(time.Second).Slowv(testlog)
 	validate(t, w.String(), true, true)
 	w.Reset()
+	l.WithDuration(time.Second).Slowv(testobj)
+	validateContentType(t, w.String(), map[string]any{}, true, true)
+	w.Reset()
 	l.WithDuration(time.Second).Sloww(testlog, Field("basket", "ball"))
 	validate(t, w.String(), true, true)
 	assert.True(t, strings.Contains(w.String(), "basket"), w.String())
@@ -311,8 +326,32 @@ func validate(t *testing.T, body string, expectedTrace, expectedSpan bool) {
 	assert.Equal(t, expectedSpan, len(val.Span) > 0, body)
 }
 
+func validateContentType(t *testing.T, body string, expectedType any, expectedTrace, expectedSpan bool) {
+	var val mockValue
+	dec := json.NewDecoder(strings.NewReader(body))
+
+	for {
+		var doc mockValue
+		err := dec.Decode(&doc)
+		if err == io.EOF {
+			// all done
+			break
+		}
+		if err != nil {
+			continue
+		}
+
+		val = doc
+	}
+
+	assert.IsType(t, expectedType, val.Content, body)
+	assert.Equal(t, expectedTrace, len(val.Trace) > 0, body)
+	assert.Equal(t, expectedSpan, len(val.Span) > 0, body)
+}
+
 type mockValue struct {
-	Trace string `json:"trace"`
-	Span  string `json:"span"`
-	Foo   string `json:"foo"`
+	Trace   string `json:"trace"`
+	Span    string `json:"span"`
+	Foo     string `json:"foo"`
+	Content any    `json:"content"`
 }
diff --git a/core/logx/syslog_test.go b/core/logx/syslog_test.go
index 8591f16c..eb6d757a 100644
--- a/core/logx/syslog_test.go
+++ b/core/logx/syslog_test.go
@@ -12,6 +12,8 @@ import (
 
 const testlog = "Stay hungry, stay foolish."
 
+var testobj = map[string]any{"foo": "bar"}
+
 func TestCollectSysLog(t *testing.T) {
 	CollectSysLog()
 	content := getContent(captureOutput(func() {