diff --git a/compiler/semstmts.nim b/compiler/semstmts.nim
index 1cf24c9beb..618100f870 100644
--- a/compiler/semstmts.nim
+++ b/compiler/semstmts.nim
@@ -1846,7 +1846,7 @@ proc typeSectionFinalPass(c: PContext, n: PNode) =
           if baseType.kind in {tyObject, tyTuple} and not baseType.n.isNil:
             checkForMetaFields(c, baseType.n, hasError)
 
-        if s.typ.kind in {tySet, tyArray, tySequence} and s.typ.elementType.kind == tyNone:
+        if s.typ.kind in {tySet, tyArray, tySequence, tyUncheckedArray} and s.typ.elementType.kind == tyNone:
           # magic generics are not filled but tyNone is added to its elements by default,
           # we lift them to tyBuiltInTypeClass here
           s.typ = newTypeS(tyBuiltInTypeClass, c,