diff --git a/lib/Support/GraphWriter.cpp b/lib/Support/GraphWriter.cpp
index c8bca6ef887..ec84f9beca0 100644
--- a/lib/Support/GraphWriter.cpp
+++ b/lib/Support/GraphWriter.cpp
@@ -137,7 +137,7 @@ void llvm::DisplayGraph(const sys::Path &Filename, bool wait,
     args.clear();
     args.push_back(gv.c_str());
     args.push_back(PSFilename.c_str());
-    args.push_back("-spartan");
+    args.push_back("--spartan");
     args.push_back(0);
     
     ErrMsg.clear();