diff --git a/addon/components/selectable-item-group.js b/addon/components/selectable-item-group.js
index b179c64d..8ea94f69 100644
--- a/addon/components/selectable-item-group.js
+++ b/addon/components/selectable-item-group.js
@@ -17,7 +17,7 @@ export default Component.extend(ParentComponentSupport, {
 
   init() {
     this._super(...arguments);
-    if (this.get('selection') === null && !!this.get('multiple')) {
+    if ((this.get('selection') === null || this.get('selection') === undefined) && !!this.get('multiple')) {
       this.set('selection', new A([]));
     }
   },