diff --git a/generator/binaryserializationcodegenerator.cpp b/generator/binaryserializationcodegenerator.cpp
index 83bce11..859dbfe 100644
--- a/generator/binaryserializationcodegenerator.cpp
+++ b/generator/binaryserializationcodegenerator.cpp
@@ -319,7 +319,7 @@ void BinarySerializationCodeGenerator::generate(std::ostream &os) const
         }
         os << "    // read base classes\n";
         for (const RelevantClass *baseClass : relevantBases) {
-            os << "    deserializer.read(static_cast<::" << baseClass->qualifiedName << " &>(customObject));\n";
+            os << "    deserializer.read(static_cast<::" << baseClass->qualifiedName << " &>(customObject), version);\n";
         }
         os << "    // read members\n";
         for (clang::Decl *const decl : relevantClass.record->decls()) {
diff --git a/lib/binary/reflector.h b/lib/binary/reflector.h
index c789542..28a7002 100644
--- a/lib/binary/reflector.h
+++ b/lib/binary/reflector.h
@@ -57,7 +57,7 @@ class BinarySerializer;
 /// \brief Reads \a customType via \a deserializer.
 /// \remarks
 /// - If \tp Type is versioned, the version is determined from the data. Otherwise \a version is assumed.
-/// - The specified \a version shall be passed to nested invocations.
+/// - The determined or specified \a version shall be passed to nested invocations.
 /// \returns Returns the determined/assumed version.
 template <typename Type, Traits::EnableIf<IsCustomType<Type>> * = nullptr>
 BinaryVersion readCustomType(BinaryDeserializer &deserializer, Type &customType, BinaryVersion version = 0);