diff --git a/sixel.go b/sixel.go
index ee590ce9..326187fa 100644
--- a/sixel.go
+++ b/sixel.go
@@ -9,7 +9,7 @@ import (
 
 const (
 	gSixelBegin  = "\033P"
-	gSixelFiller = '\u2800'
+	gSixelFiller = '\u2000'
 )
 
 type sixelScreen struct {