diff --git a/editor.js b/editor.js
index 03add8b..9f5af62 100644
--- a/editor.js
+++ b/editor.js
@@ -502,6 +502,7 @@ function openContextMenu(x, y, menu) {
   menu.style.top = y - 25;
   menu.style.left = x + 20;
   menu.style.display = 'block';
+  edgeFrom = edgeTo = null;
 }
 
 var newStateCoords = {'x': 0, 'y': 0}; //Initial coordinates of the next new state