diff --git a/lib/VMCore/Module.cpp b/lib/VMCore/Module.cpp
index 885a604abc1..3f599958985 100644
--- a/lib/VMCore/Module.cpp
+++ b/lib/VMCore/Module.cpp
@@ -20,6 +20,7 @@
 #include "SymbolTableListTraitsImpl.h"
 #include <algorithm>
 #include <cstdarg>
+#include <iostream>
 #include <map>
 using namespace llvm;
 
diff --git a/lib/VMCore/Pass.cpp b/lib/VMCore/Pass.cpp
index 3aa1d133294..88813297ec6 100644
--- a/lib/VMCore/Pass.cpp
+++ b/lib/VMCore/Pass.cpp
@@ -19,6 +19,7 @@
 #include "llvm/ModuleProvider.h"
 #include "Support/STLExtras.h"
 #include "Support/TypeInfo.h"
+#include <iostream>
 #include <set>
 using namespace llvm;
 
diff --git a/lib/VMCore/Value.cpp b/lib/VMCore/Value.cpp
index f8dd186b65b..01c7b3f4620 100644
--- a/lib/VMCore/Value.cpp
+++ b/lib/VMCore/Value.cpp
@@ -17,6 +17,7 @@
 #include "llvm/Constant.h"
 #include "Support/LeakDetector.h"
 #include <algorithm>
+#include <iostream>
 using namespace llvm;
 
 //===----------------------------------------------------------------------===//
diff --git a/lib/VMCore/Verifier.cpp b/lib/VMCore/Verifier.cpp
index c718f68048c..0215c606c87 100644
--- a/lib/VMCore/Verifier.cpp
+++ b/lib/VMCore/Verifier.cpp
@@ -55,6 +55,7 @@
 #include "llvm/Support/InstVisitor.h"
 #include "Support/STLExtras.h"
 #include <algorithm>
+#include <iostream>
 #include <sstream>
 using namespace llvm;