diff --git a/src/lib/viewers/BaseViewer.js b/src/lib/viewers/BaseViewer.js
index 6308ae1d1..bbab51f35 100644
--- a/src/lib/viewers/BaseViewer.js
+++ b/src/lib/viewers/BaseViewer.js
@@ -722,6 +722,10 @@ class BaseViewer extends EventEmitter {
      * @return {boolean} Whether or not viewer is annotatable
      */
     isAnnotatable(type) {
+        if (!this.annotatorConf) {
+            return false;
+        }
+
         const { TYPE: annotationTypes } = this.annotatorConf;
         if (type && annotationTypes) {
             if (!annotationTypes.some((annotationType) => type === annotationType)) {
diff --git a/src/lib/viewers/__tests__/BaseViewer-test.js b/src/lib/viewers/__tests__/BaseViewer-test.js
index 3de92d51d..7acf547a2 100644
--- a/src/lib/viewers/__tests__/BaseViewer-test.js
+++ b/src/lib/viewers/__tests__/BaseViewer-test.js
@@ -806,6 +806,11 @@ describe('lib/viewers/BaseViewer', () => {
             sandbox.stub(base, 'areAnnotationsEnabled').returns(true);
         });
 
+        it('should return false if annotations are not allowed on the current viewer', () => {
+            base.annotatorConf = undefined;
+            expect(base.isAnnotatable('point')).to.equal(false);
+        })
+
         it('should return true if the type is supported by the viewer', () => {
             expect(base.isAnnotatable('point')).to.equal(true);
         });