diff --git a/llvm/lib/Bytecode/Reader/ArchiveReader.cpp b/llvm/lib/Bytecode/Reader/ArchiveReader.cpp
index 1e2d2b4..1d8530f 100644
--- a/llvm/lib/Bytecode/Reader/ArchiveReader.cpp
+++ b/llvm/lib/Bytecode/Reader/ArchiveReader.cpp
@@ -20,6 +20,7 @@
 #include "llvm/Module.h"
 #include "Support/FileUtilities.h"
 #include <cstdlib>
+#include <iostream>
 using namespace llvm;
 
 namespace {