Index: source/Symbol/ClangASTImporter.cpp
===================================================================
--- source/Symbol/ClangASTImporter.cpp
+++ source/Symbol/ClangASTImporter.cpp
@@ -1050,7 +1050,7 @@
     TagDecl *to_tag_decl = dyn_cast<TagDecl>(to);
 
     to_tag_decl->setHasExternalLexicalStorage();
-    to_tag_decl->setMustBuildLookupTable();
+    to_tag_decl->getPrimaryContext()->setMustBuildLookupTable();
 
     if (log)
       log->Printf(