diff --git a/web/app/sketch/segment.js b/web/app/sketch/segment.js
index 0ee478ad..853140d3 100644
--- a/web/app/sketch/segment.js
+++ b/web/app/sketch/segment.js
@@ -65,7 +65,7 @@ TCAD.TWO.AddSegmentTool.prototype.mousewheel = function(e) {
 };
 
 TCAD.TWO.AddSegmentTool.prototype.keydown = function(e) {
-  if (this.multi && e.keyCode == 27) {
+  if (this.multi && && this.line != null && e.keyCode == 27) {
     this.viewer.remove(this.line);
     this.viewer.refresh();
   }