diff --git a/PredefinedType.cpp b/PredefinedType.cpp
index 9c15730..c1468ab 100644
--- a/PredefinedType.cpp
+++ b/PredefinedType.cpp
@@ -25,6 +25,9 @@
     : mName(name) {
 }
 
+void PredefinedType::addNamedTypesToSet(std::set<const FQName> &) const {
+    // do nothing
+}
 std::string PredefinedType::getCppType(
         StorageMode mode,
         std::string *extra,