diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 08d0b06..99c272e 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -45,6 +45,7 @@
 #include "llvm/Target/TargetLowering.h"
 #include <algorithm>
 #include <cmath>
+#include <iostream>
 using namespace llvm;
 
 namespace {