diff --git a/lib/Frontend/CreateInvocationFromCommandLine.cpp b/lib/Frontend/CreateInvocationFromCommandLine.cpp
index 8fdc06d..ccfa865 100644
--- a/lib/Frontend/CreateInvocationFromCommandLine.cpp
+++ b/lib/Frontend/CreateInvocationFromCommandLine.cpp
@@ -30,7 +30,7 @@
 /// argument vector.
 CompilerInvocation *
 clang::createInvocationFromCommandLine(ArrayRef<const char *> ArgList,
-                                   llvm::IntrusiveRefCntPtr<Diagnostic> Diags) {
+                            llvm::IntrusiveRefCntPtr<DiagnosticsEngine> Diags) {
   if (!Diags.getPtr()) {
     // No diagnostics engine was provided, so create our own diagnostics object
     // with the default options.