diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
index 31e4885eabf..c7baf5f5d38 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -15,6 +15,7 @@
 #define CODEGEN_ASMPRINTER_DWARFDEBUG_H__
 
 #include "llvm/CodeGen/AsmPrinter.h"
+#include "DIE.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/SmallPtrSet.h"