diff --git a/SpaceMarkdown.go b/SpaceMarkdown.go
index 49e1a55..5a6a3c7 100644
--- a/SpaceMarkdown.go
+++ b/SpaceMarkdown.go
@@ -4,6 +4,7 @@ import (
 	"bufio"
 	"flag"
 	"fmt"
+	"io"
 	"log"
 	"os"
 	"regexp"
@@ -58,7 +59,7 @@ func insertSpace2Line(line string) string {
 
 func SpacePipeline(file *os.File) []string {
 	var txt []string
-	file.Seek(0, os.SEEK_SET)
+	file.Seek(0, io.SeekStart)
 	reader := bufio.NewReader(file)
 	for {
 		line, e := reader.ReadString('\n')