diff --git a/web/app.js b/web/app.js
index 3ff363ba1..3f2dfc95b 100644
--- a/web/app.js
+++ b/web/app.js
@@ -369,7 +369,6 @@ let PDFViewerApplication = {
 
     // TODO: improve `PDFFindBar` constructor parameter passing
     let findBarConfig = Object.create(appConfig.findBar);
-    findBarConfig.findController = this.findController;
     findBarConfig.eventBus = eventBus;
     this.findBar = new PDFFindBar(findBarConfig, this.l10n);
 
diff --git a/web/pdf_find_bar.js b/web/pdf_find_bar.js
index 61362099f..b1696b5c9 100644
--- a/web/pdf_find_bar.js
+++ b/web/pdf_find_bar.js
@@ -38,15 +38,9 @@ class PDFFindBar {
     this.findResultsCount = options.findResultsCount || null;
     this.findPreviousButton = options.findPreviousButton || null;
     this.findNextButton = options.findNextButton || null;
-    this.findController = options.findController || null;
     this.eventBus = options.eventBus;
     this.l10n = l10n;
 
-    if (this.findController === null) {
-      throw new Error('PDFFindBar cannot be used without a ' +
-                      'PDFFindController instance.');
-    }
-
     // Add event listeners to the DOM elements.
     this.toggleButton.addEventListener('click', () => {
       this.toggle();