diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
index 3e685f34538..a554b625f28 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
@@ -16,6 +16,7 @@
 #include "llvm/Function.h"
 #include "llvm/Support/GraphWriter.h"
 #include "llvm/ADT/StringExtras.h"
+#include "llvm/Config/config.h"
 #include <fstream>
 using namespace llvm;