diff --git a/Source/IGListKit/IGListCollectionViewLayout.mm b/Source/IGListKit/IGListCollectionViewLayout.mm
index e1c2a3d3..07da035d 100644
--- a/Source/IGListKit/IGListCollectionViewLayout.mm
+++ b/Source/IGListKit/IGListCollectionViewLayout.mm
@@ -301,7 +301,7 @@ static void adjustZIndexForAttributes(UICollectionViewLayoutAttributes *attribut
     CGRect frame = _sectionData[indexPath.section].itemBounds[indexPath.item];
     // Avoid setting frames with nan values
     if (isnan(frame.origin.x) || isnan(frame.origin.y) || isnan(frame.size.width) || isnan(frame.size.height)) {
-        FBReportMustFix(@"IGListCollectionViewLayout encountered nan frame values for indexPath %@. Original frame: %@", indexPath, NSStringFromCGRect(frame));
+        IGFailAssert(@"IGListCollectionViewLayout encountered nan frame values for indexPath %@. Original frame: %@", indexPath, NSStringFromCGRect(frame));
         return nil;
     }
     attributes.frame = frame;