diff --git a/pkg/protocol/header.go b/pkg/protocol/header.go
index 278b137b5..88885483c 100644
--- a/pkg/protocol/header.go
+++ b/pkg/protocol/header.go
@@ -1766,6 +1766,8 @@ func (h *ResponseHeader) setSpecialHeader(key, value []byte) bool {
 			// Transfer-Encoding is managed automatically.
 			return true
 		} else if utils.CaseInsensitiveCompare(bytestr.StrTrailer, key) {
+			// copy value to avoid panic
+			value = append(h.bufKV.value[:0], value...)
 			h.Trailer().SetTrailers(value)
 			return true
 		}
diff --git a/pkg/protocol/header_test.go b/pkg/protocol/header_test.go
index a14704053..ba2bd6998 100644
--- a/pkg/protocol/header_test.go
+++ b/pkg/protocol/header_test.go
@@ -806,3 +806,13 @@ func TestResponseHeaderDateEmpty(t *testing.T) {
 		t.Fatalf("ResponseDateNoDefaultNotEmpty fail, response: \n%+v\noutcome: \n%q\n", h, headers) //nolint:govet
 	}
 }
+
+func TestSetTrailerWithROString(t *testing.T) {
+	h := &RequestHeader{}
+	h.Add(consts.HeaderTrailer, "foo,bar,hertz")
+	assert.DeepEqual(t, "Foo, Bar, Hertz", h.Get(consts.HeaderTrailer))
+
+	h1 := &ResponseHeader{}
+	h1.Add(consts.HeaderTrailer, "foo,bar,hertz")
+	assert.DeepEqual(t, "Foo, Bar, Hertz", h1.Get(consts.HeaderTrailer))
+}