diff --git a/internal/unsafe2/unsafe.go b/internal/hack/hack.go
similarity index 98%
rename from internal/unsafe2/unsafe.go
rename to internal/hack/hack.go
index c356d3e..c219209 100644
--- a/internal/unsafe2/unsafe.go
+++ b/internal/hack/hack.go
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package unsafe2
+package hack
 
 import "unsafe"
 
diff --git a/internal/unsafe2/unsafe_test.go b/internal/hack/hack_test.go
similarity index 98%
rename from internal/unsafe2/unsafe_test.go
rename to internal/hack/hack_test.go
index 0b33a89..749dd2f 100644
--- a/internal/unsafe2/unsafe_test.go
+++ b/internal/hack/hack_test.go
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package unsafe2
+package hack
 
 import (
 	"testing"
diff --git a/protocol/thrift/binary.go b/protocol/thrift/binary.go
index 7c276fb..b4648ab 100644
--- a/protocol/thrift/binary.go
+++ b/protocol/thrift/binary.go
@@ -22,7 +22,7 @@ import (
 	"math"
 	"unsafe"
 
-	"github.com/cloudwego/gopkg/internal/unsafe2"
+	"github.com/cloudwego/gopkg/internal/hack"
 )
 
 var Binary BinaryProtocol
@@ -121,7 +121,7 @@ func (BinaryProtocol) WriteString(buf []byte, v string) int {
 }
 
 func (p BinaryProtocol) WriteStringNocopy(buf []byte, w NocopyWriter, v string) int {
-	return p.WriteBinaryNocopy(buf, w, unsafe2.StringToByteSlice(v))
+	return p.WriteBinaryNocopy(buf, w, hack.StringToByteSlice(v))
 }
 
 // Append methods