diff --git a/lib/Frontend/RewriteMacros.cpp b/lib/Frontend/RewriteMacros.cpp
index 5db2170..30cd6ff 100644
--- a/lib/Frontend/RewriteMacros.cpp
+++ b/lib/Frontend/RewriteMacros.cpp
@@ -19,6 +19,8 @@
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/System/Path.h"
 #include "llvm/ADT/OwningPtr.h"
+#include <cstdio>
+
 using namespace clang;
 
 /// isSameToken - Return true if the two specified tokens start have the same