diff --git a/lib/mixins/canvas-drawer.js b/lib/mixins/canvas-drawer.js
index cd35a9f8..4afdc268 100644
--- a/lib/mixins/canvas-drawer.js
+++ b/lib/mixins/canvas-drawer.js
@@ -431,6 +431,7 @@ export default class CanvasDrawer extends Mixin {
         let tokens = []
         let scopes = []
         let textIndex = 0
+        // console.log(lineText, invisibleRegExp, lineText.replace(invisibleRegExp, ' '))
         for (let tagCode of tagCodes) {
           if (displayLayer.isOpenTagCode(tagCode)) {
             scopes.push(displayLayer.tagForCode(tagCode))
@@ -503,13 +504,15 @@ export default class CanvasDrawer extends Mixin {
    */
   getInvisibleRegExp () {
     let invisibles = this.getTextEditor().getInvisibles()
-    let regexp = ''
-    if (invisibles.cr != null) { regexp += invisibles.cr + '|' }
-    if (invisibles.eol != null) { regexp += invisibles.eol + '|' }
-    if (invisibles.space != null) { regexp += invisibles.space + '|' }
-    if (invisibles.tab != null) { regexp += invisibles.tab + '|' }
-
-    return new RegExp(_.escapeRegExp(regexp.slice(0, -1)), 'g')
+    let regexp = []
+    if (invisibles.cr != null) { regexp.push(invisibles.cr) }
+    if (invisibles.eol != null) { regexp.push(invisibles.eol) }
+    if (invisibles.space != null) { regexp.push(invisibles.space) }
+    if (invisibles.tab != null) { regexp.push(invisibles.tab) }
+
+    return RegExp(regexp.filter((s) => {
+      return typeof s === 'string'
+    }).map(_.escapeRegExp).join('|'), 'g')
   }
 
   /**