diff --git a/llvm/lib/CodeGen/ELFWriter.cpp b/llvm/lib/CodeGen/ELFWriter.cpp
index b58fc1f..c0b2cdf 100644
--- a/llvm/lib/CodeGen/ELFWriter.cpp
+++ b/llvm/lib/CodeGen/ELFWriter.cpp
@@ -37,6 +37,7 @@
 #include "llvm/CodeGen/MachineConstantPool.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Support/Mangler.h"
+#include <iostream>
 using namespace llvm;
 
 //===----------------------------------------------------------------------===//