diff --git a/source/dub/internal/undead/xml.d b/source/dub/internal/undead/xml.d
index ff44440..4c11a47 100644
--- a/source/dub/internal/undead/xml.d
+++ b/source/dub/internal/undead/xml.d
@@ -2955,7 +2955,7 @@
 
 private
 {
-    inout(T) toType(T)(inout Object o)
+    inout(T) toType(T)(scope return inout Object o)
     {
         T t = cast(T)(o);
         if (t is null)