r.go | 9 +++++----

diff --git a/r.go b/r.go
index 6789d4fc89f7b6e28e1835a9c135329a6765ad4f91eb1e6147d2c1b53bd3e9d2..5201abe7e3363c95b6d76e71a00346ed4b0c0933ced908370538ae5c09e729f5 100644
--- a/r.go
+++ b/r.go
@@ -20,6 +20,7 @@
 import (
 	"bufio"
 	"errors"
+	"fmt"
 	"io"
 	"strconv"
 )
@@ -45,11 +46,11 @@ 		return 0, errors.New("current chunk is unread")
 	}
 	lenRaw, err := r.r.ReadSlice(':')
 	if err != nil {
-		return 0, err
+		return 0, fmt.Errorf("netstring header: %w", err)
 	}
 	size, err := strconv.ParseUint(string(lenRaw[:len(lenRaw)-1]), 10, 64)
 	if err != nil {
-		return 0, err
+		return 0, fmt.Errorf("netstring header: %w", err)
 	}
 	r.left = size
 	r.eof = false
@@ -59,10 +60,10 @@
 func (r *Reader) checkTerminator() error {
 	b, err := r.r.ReadByte()
 	if err != nil {
-		return err
+		return fmt.Errorf("netstring terminator: %w", err)
 	}
 	if b != ',' {
-		return errors.New("no terminator found")
+		return errors.New("netstring terminator: not found")
 	}
 	return nil
 }