diff --git a/llvm/lib/Analysis/DataStructure/DataStructure.cpp b/llvm/lib/Analysis/DataStructure/DataStructure.cpp
index a3fecec..c25256a 100644
--- a/llvm/lib/Analysis/DataStructure/DataStructure.cpp
+++ b/llvm/lib/Analysis/DataStructure/DataStructure.cpp
@@ -10,6 +10,7 @@
 #include "llvm/DerivedTypes.h"
 #include "llvm/Target/TargetData.h"
 #include "llvm/Assembly/Writer.h"
+#include "Support/Debug.h"
 #include "Support/STLExtras.h"
 #include "Support/Statistic.h"
 #include "Support/Timer.h"