r.go | 11 ++++++++---

diff --git a/r.go b/r.go
index 7400e07f03e1724923a30c38ccfbe995e477afb11700dd922a89c0222442764e..a100f0996112eb7f858e8a16242b24158be8e152967f8ba38f5a3368c87e451e 100644
--- a/r.go
+++ b/r.go
@@ -17,13 +17,18 @@ package recfile
 
 import (
 	"bufio"
-	"errors"
 	"io"
 	"strings"
 )
 
 type Reader struct {
 	scanner *bufio.Scanner
+}
+
+type FormatErr string
+
+func (err FormatErr) Error() string {
+	return string(err)
 }
 
 // Create Reader for iterating through the records. It uses
@@ -118,7 +123,7 @@ 		}
 
 		name, line = getKeyValue(text)
 		if name == "" {
-			return fields, errors.New("invalid field format")
+			return fields, FormatErr("invalid field format")
 		}
 
 		if len(line) > 0 && line[len(line)-1] == '\\' {
@@ -129,7 +134,7 @@ 			lines = append(lines, line)
 		}
 	}
 	if continuation {
-		return fields, errors.New("left continuation")
+		return fields, FormatErr("left continuation")
 	}
 	if len(lines) > 0 {
 		fields = append(fields, Field{name, strings.Join(lines, "")})