diff --git a/lib/VMCore/ConstantsContext.h b/lib/VMCore/ConstantsContext.h
index 60ae13d2385..08224e4488b 100644
--- a/lib/VMCore/ConstantsContext.h
+++ b/lib/VMCore/ConstantsContext.h
@@ -17,6 +17,7 @@
 
 #include "llvm/Instructions.h"
 #include "llvm/Operator.h"
+#include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"
 #include <map>
@@ -763,7 +764,7 @@ public:
   }
 
   void dump() const {
-    DEBUG(errs() << "Constant.cpp: ConstantUniqueMap\n");
+    DEBUG(dbgs() << "Constant.cpp: ConstantUniqueMap\n");
   }
 };