diff --git a/lib/Serialization/ASTWriter.cpp b/lib/Serialization/ASTWriter.cpp
index 13b333d..21c452e 100644
--- a/lib/Serialization/ASTWriter.cpp
+++ b/lib/Serialization/ASTWriter.cpp
@@ -3827,6 +3827,7 @@
   Record.push_back(Data.HasTrivialDestructor);
   Record.push_back(Data.HasNonLiteralTypeFieldsOrBases);
   Record.push_back(Data.ComputedVisibleConversions);
+  Record.push_back(Data.NeedsImplicitDefaultConstructor);
   Record.push_back(Data.DeclaredDefaultConstructor);
   Record.push_back(Data.DeclaredCopyConstructor);
   Record.push_back(Data.DeclaredCopyAssignment);