diff --git a/clang/lib/Frontend/PCHReader.cpp b/clang/lib/Frontend/PCHReader.cpp
index 7ca0300eed1e..24e4e2b02fb3 100644
--- a/clang/lib/Frontend/PCHReader.cpp
+++ b/clang/lib/Frontend/PCHReader.cpp
@@ -270,7 +270,7 @@ public:
     // Read all of the declarations visible at global scope with this
     // name.
     Sema *SemaObj = Reader.getSema();
-    if (!SemaObj) return II;
+    if (Reader.getContext() == 0) return II;
     
     while (DataLen > 0) {
       NamedDecl *D = cast<NamedDecl>(Reader.GetDecl(ReadUnalignedLE32(d)));