diff --git a/lib/Frontend/CreateInvocationFromCommandLine.cpp b/lib/Frontend/CreateInvocationFromCommandLine.cpp
index 1ce23f7..e25eb43 100644
--- a/lib/Frontend/CreateInvocationFromCommandLine.cpp
+++ b/lib/Frontend/CreateInvocationFromCommandLine.cpp
@@ -34,9 +34,7 @@
   if (!Diags.getPtr()) {
     // No diagnostics engine was provided, so create our own diagnostics object
     // with the default options.
-    Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions,
-                                                ArgList.size(),
-                                                ArgList.begin());
+    Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions);
   }
 
   SmallVector<const char *, 16> Args;