diff --git a/src/preserves/schema.nim b/src/preserves/schema.nim
index ccef6e4..4649ef2 100644
--- a/src/preserves/schema.nim
+++ b/src/preserves/schema.nim
@@ -152,6 +152,7 @@ type
 
     of DefinitionKind.`and`:
         `and`*: DefinitionAnd[E]
+          # doesn't build with C++
 
     of DefinitionKind.`Pattern`:
         `pattern`*: Pattern[E]