diff --git a/tools/driver/driver.cpp b/tools/driver/driver.cpp
index de2b899..81bc985 100644
--- a/tools/driver/driver.cpp
+++ b/tools/driver/driver.cpp
@@ -395,7 +395,7 @@
   IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
 
   DiagnosticsEngine Diags(DiagID, &*DiagOpts, DiagClient);
-  ProcessWarningOptions(Diags, *DiagOpts);
+  ProcessWarningOptions(Diags, *DiagOpts, /*ReportDiags=*/false);
 
   Driver TheDriver(Path.str(), llvm::sys::getDefaultTargetTriple(),
                    "a.out", Diags);