1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Frontend/CompilerInstance.cpp b/lib/Frontend/CompilerInstance.cpp
index c58e3af508..d9535735b5 100644
--- a/lib/Frontend/CompilerInstance.cpp
+++ b/lib/Frontend/CompilerInstance.cpp
@@ -42,7 +42,7 @@
 using namespace clang;
 
 CompilerInstance::CompilerInstance()
-  : Invocation(new CompilerInvocation()) {
+  : Invocation(new CompilerInvocation()), ModuleManager(0) {
 }
 
 CompilerInstance::~CompilerInstance() {
@@ -275,6 +275,7 @@ void CompilerInstance::createPCHExternalASTSource(llvm::StringRef Path,
                                           getPreprocessor(), getASTContext(),
                                           DeserializationListener,
                                           Preamble));
+  ModuleManager = static_cast<ASTReader*>(Source.get());
   getASTContext().setExternalSource(Source);
 }