diff --git a/internal/status/status.go b/internal/status/status.go
index 981c265b4..710223b8d 100644
--- a/internal/status/status.go
+++ b/internal/status/status.go
@@ -97,7 +97,7 @@ func (s *Status) Err() error {
 	if s.Code() == codes.OK {
 		return nil
 	}
-	return (*Error)(s.Proto())
+	return &Error{e: s.Proto()}
 }
 
 // WithDetails returns a new status with the provided details messages appended to the status.
@@ -136,18 +136,19 @@ func (s *Status) Details() []interface{} {
 	return details
 }
 
-// Error is an alias of a status proto. It implements error and Status,
+// Error wraps a pointer of a status proto. It implements error and Status,
 // and a nil *Error should never be returned by this package.
-type Error spb.Status
+type Error struct {
+	e *spb.Status
+}
 
 func (e *Error) Error() string {
-	p := (*spb.Status)(e)
-	return fmt.Sprintf("rpc error: code = %s desc = %s", codes.Code(p.GetCode()), p.GetMessage())
+	return fmt.Sprintf("rpc error: code = %s desc = %s", codes.Code(e.e.GetCode()), e.e.GetMessage())
 }
 
 // GRPCStatus returns the Status represented by se.
 func (e *Error) GRPCStatus() *Status {
-	return FromProto((*spb.Status)(e))
+	return FromProto(e.e)
 }
 
 // Is implements future error.Is functionality.
@@ -157,5 +158,5 @@ func (e *Error) Is(target error) bool {
 	if !ok {
 		return false
 	}
-	return proto.Equal((*spb.Status)(e), (*spb.Status)(tse))
+	return proto.Equal(e.e, tse.e)
 }