diff --git a/Example/lottie-ios/AnimatedTextField.m b/Example/lottie-ios/AnimatedTextField.m
index 0aaf754703..4669399345 100644
--- a/Example/lottie-ios/AnimatedTextField.m
+++ b/Example/lottie-ios/AnimatedTextField.m
@@ -296,6 +296,9 @@
 - (CGSize)collectionView:(UICollectionView *)collectionView
                   layout:(UICollectionViewLayout*)collectionViewLayout
   sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
+  if (indexPath.row >= letterSizes_.count) {
+    return CGSizeZero;
+  }
   NSValue *value = letterSizes_[indexPath.row];
   return value.CGSizeValue;
 }