diff --git a/lib/AST/InheritViz.cpp b/lib/AST/InheritViz.cpp
index 5e4dab4..dd2fc14 100644
--- a/lib/AST/InheritViz.cpp
+++ b/lib/AST/InheritViz.cpp
@@ -149,7 +149,7 @@
 
   llvm::errs() << "Writing '" << Filename.c_str() << "'... ";
 
-  llvm::raw_fd_ostream O(Filename.c_str(), ErrMsg);
+  llvm::raw_fd_ostream O(Filename.c_str(), false, ErrMsg);
 
   if (ErrMsg.empty()) {
     InheritanceHierarchyWriter Writer(Context, O);