diff --git a/flags.go b/flags.go
index f6ae676..927ccb5 100644
--- a/flags.go
+++ b/flags.go
@@ -27,7 +27,6 @@ package log
 
 import (
 	"net/http"
-	"os"
 	"sync"
 )
 
@@ -57,7 +56,6 @@ type LogFlag struct {
 
 var flags []*LogFlag
 var daemonMode bool
-var captureMode *os.File
 var httpMode http.ResponseWriter
 
 func init() {
diff --git a/reallog.go b/reallog.go
index 3c565a3..dad2770 100644
--- a/reallog.go
+++ b/reallog.go
@@ -5,17 +5,19 @@ package log
 
 import (
 	"fmt"
+	"io"
 	reallog "log"
 	"net/http"
-	"os"
 )
 
 func DaemonMode(b bool) {
 	daemonMode = b
 }
 
-func CaptureMode(f *os.File) {
-	captureMode = f
+var captureMode io.Writer
+
+func CaptureMode(w io.Writer) {
+	captureMode = w
 }
 
 func HttpMode(w http.ResponseWriter) {