diff --git a/src/dev/flang/ast/InlineArray.java b/src/dev/flang/ast/InlineArray.java
index e589ac751..c4ab54049 100644
--- a/src/dev/flang/ast/InlineArray.java
+++ b/src/dev/flang/ast/InlineArray.java
@@ -181,6 +181,7 @@ private AbstractType elementType(AbstractType t)
     if (PRECONDITIONS) require
       (t != null);
 
+    // NYI see issue: #1817
     if (Types.resolved.f_array.inheritsFrom(t.featureOfType()) &&
         t.generics().size() == 1)
       {