diff --git a/lib/Serialization/ASTReaderStmt.cpp b/lib/Serialization/ASTReaderStmt.cpp
index a6da3c7..6e8ad4f 100644
--- a/lib/Serialization/ASTReaderStmt.cpp
+++ b/lib/Serialization/ASTReaderStmt.cpp
@@ -1247,6 +1247,7 @@
 void ASTStmtReader::VisitUnaryTypeTraitExpr(UnaryTypeTraitExpr *E) {
   VisitExpr(E);
   E->UTT = (UnaryTypeTrait)Record[Idx++];
+  E->Value = (bool)Record[Idx++];
   SourceRange Range = Reader.ReadSourceRange(Record, Idx);
   E->Loc = Range.getBegin();
   E->RParen = Range.getEnd();
diff --git a/lib/Serialization/ASTWriterStmt.cpp b/lib/Serialization/ASTWriterStmt.cpp
index 3701e0c..7a5b949 100644
--- a/lib/Serialization/ASTWriterStmt.cpp
+++ b/lib/Serialization/ASTWriterStmt.cpp
@@ -1280,6 +1280,7 @@
 void ASTStmtWriter::VisitUnaryTypeTraitExpr(UnaryTypeTraitExpr *E) {
   VisitExpr(E);
   Record.push_back(E->getTrait());
+  Record.push_back(E->getValue());
   Writer.AddSourceRange(E->getSourceRange(), Record);
   Writer.AddTypeSourceInfo(E->getQueriedTypeSourceInfo(), Record);
   Code = serialization::EXPR_CXX_UNARY_TYPE_TRAIT;