diff --git a/src/controllers/AnnotationModeController.js b/src/controllers/AnnotationModeController.js
index 6c9cb1a0f..cbb784b9a 100644
--- a/src/controllers/AnnotationModeController.js
+++ b/src/controllers/AnnotationModeController.js
@@ -443,12 +443,8 @@ class AnnotationModeController extends EventEmitter {
             const pageThreads = this.threads[pageNum].all() || [];
             pageThreads.forEach((thread) => {
                 if (isPending(thread.state)) {
+                    this.unregisterThread(thread);
                     hadPendingThreads = true;
-
-                    /* eslint-disable no-console */
-                    console.error('Pending annotation thread destroyed', thread.threadNumber);
-                    /* eslint-enable no-console */
-
                     thread.destroy();
                 } else if (thread.isDialogVisible()) {
                     thread.hideDialog();
diff --git a/src/controllers/__tests__/AnnotationModeController-test.js b/src/controllers/__tests__/AnnotationModeController-test.js
index e036ebee6..215aca52a 100644
--- a/src/controllers/__tests__/AnnotationModeController-test.js
+++ b/src/controllers/__tests__/AnnotationModeController-test.js
@@ -512,7 +512,7 @@ describe('controllers/AnnotationModeController', () => {
         beforeEach(() => {
             stubs.isPending = sandbox.stub(util, 'isPending').returns(false);
             stubs.isPending.withArgs(STATES.pending).returns(true);
-
+            sandbox.stub(controller, 'unregisterThread');
             controller.registerThread(stubs.thread);
         });
 
@@ -520,6 +520,8 @@ describe('controllers/AnnotationModeController', () => {
             stubs.threadMock.expects('destroy');
             const destroyed = controller.destroyPendingThreads();
             expect(destroyed).to.be.true;
+            expect(controller.unregisterThread).to.be.called;
+            expect(controller.unregisterThread).to.be.called;
         });
 
         it('should not destroy and return false if there are no threads', () => {
@@ -528,6 +530,7 @@ describe('controllers/AnnotationModeController', () => {
             stubs.isPending.returns(false);
             const destroyed = controller.destroyPendingThreads();
             expect(destroyed).to.be.false;
+            expect(controller.unregisterThread).to.not.be.called;
         });
 
         it('should not destroy and return false if the threads are not pending', () => {
@@ -537,6 +540,7 @@ describe('controllers/AnnotationModeController', () => {
             stubs.threadMock.expects('hideDialog').never();
             const destroyed = controller.destroyPendingThreads();
             expect(destroyed).to.be.false;
+            expect(controller.unregisterThread).to.not.be.called;
         });
 
         it('should hide non-pending thread dialogs that are visible', () => {
@@ -546,6 +550,7 @@ describe('controllers/AnnotationModeController', () => {
             stubs.threadMock.expects('hideDialog');
             const destroyed = controller.destroyPendingThreads();
             expect(destroyed).to.be.false;
+            expect(controller.unregisterThread).to.not.be.called;
         });
 
         it('should destroy only pending threads, and return true', () => {
@@ -568,6 +573,7 @@ describe('controllers/AnnotationModeController', () => {
             const destroyed = controller.destroyPendingThreads();
 
             expect(destroyed).to.be.true;
+            expect(controller.unregisterThread).to.be.called;
         });
     });