diff --git a/lib/Serialization/ASTReaderStmt.cpp b/lib/Serialization/ASTReaderStmt.cpp
index 04fc2bd..9e0157d 100644
--- a/lib/Serialization/ASTReaderStmt.cpp
+++ b/lib/Serialization/ASTReaderStmt.cpp
@@ -1576,6 +1576,7 @@
 void ASTStmtReader::VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *E) {
   VisitExpr(E);
   E->Temporary = Reader.ReadSubExpr();
+  E->ExtendingDecl = ReadDeclAs<ValueDecl>(Record, Idx);
 }
 
 void ASTStmtReader::VisitOpaqueValueExpr(OpaqueValueExpr *E) {
diff --git a/lib/Serialization/ASTWriterStmt.cpp b/lib/Serialization/ASTWriterStmt.cpp
index 5f7ac01..5a8baa9 100644
--- a/lib/Serialization/ASTWriterStmt.cpp
+++ b/lib/Serialization/ASTWriterStmt.cpp
@@ -1572,6 +1572,7 @@
 void ASTStmtWriter::VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *E) {
   VisitExpr(E);
   Writer.AddStmt(E->Temporary);
+  Writer.AddDeclRef(E->ExtendingDecl, Record);
   Code = serialization::EXPR_MATERIALIZE_TEMPORARY;
 }