diff --git a/docs/_docs/uicollectionviewinterop.md b/docs/_docs/uicollectionviewinterop.md
index a918a0cf8..d1f9fb668 100755
--- a/docs/_docs/uicollectionviewinterop.md
+++ b/docs/_docs/uicollectionviewinterop.md
@@ -71,7 +71,14 @@ For this example, the data source method `collectionNode:nodeBlockForItemAtIndex
   </pre>
 
   <pre lang="swift" class = "swiftCode hidden">
-  // Click the "Edit on GitHub" button at the bottom of this 
+  // Setting the return type to implicitly unwrapped optional
+  // helps overcome compiler error when trying to return nil
+  func collectionNode(_ collectionNode: ASCollectionNode,
+                        nodeBlockForItemAt indexPath: IndexPath) -> ASCellNodeBlock! {
+        return optionalNode
+    }
+
+  // Click the "Edit on GitHub" button at the bottom of this  
   // page to contribute the swift code for this section. Thanks!
   </pre>
 </div>