diff --git a/llvm/lib/Target/X86/X86ATTAsmPrinter.cpp b/llvm/lib/Target/X86/X86ATTAsmPrinter.cpp
index f8e1724..c4639b3 100755
--- a/llvm/lib/Target/X86/X86ATTAsmPrinter.cpp
+++ b/llvm/lib/Target/X86/X86ATTAsmPrinter.cpp
@@ -18,6 +18,7 @@
 #include "X86TargetMachine.h"
 #include "llvm/Module.h"
 #include "llvm/Support/Mangler.h"
+#include <iostream>
 using namespace llvm;
 using namespace x86;