diff --git a/static/js/terminal/index.js b/static/js/terminal/index.js
index 4f975dd..dec5c1c 100644
--- a/static/js/terminal/index.js
+++ b/static/js/terminal/index.js
@@ -81,7 +81,6 @@ require('./lib/options')(Terminal);
 require('./lib/open')(Terminal);
 require('./lib/destroy')(Terminal);
 require('./lib/refresh')(Terminal);
-require('./lib/scrollDisp')(Terminal);
 
 require('./lib/write')(Terminal);
 
diff --git a/static/js/terminal/lib/scrollDisp.js b/static/js/terminal/lib/scrollDisp.js
deleted file mode 100644
index 8eb7337..0000000
--- a/static/js/terminal/lib/scrollDisp.js
+++ /dev/null
@@ -1,19 +0,0 @@
-/**
- * Created by nuintun on 2015/11/24.
- */
-
-'use strict';
-
-module.exports = function (Terminal){
-  Terminal.prototype.scrollDisp = function (disp){
-    this.ydisp += disp;
-
-    if (this.ydisp > this.ybase) {
-      this.ydisp = this.ybase;
-    } else if (this.ydisp < 0) {
-      this.ydisp = 0;
-    }
-
-    this.refresh(0, this.rows - 1);
-  };
-};