diff --git a/lib/CodeGen/AsmPrinter/DwarfWriter.cpp b/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
index 4ca5583a6cb..3057797e7f2 100644
--- a/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
@@ -1747,6 +1747,7 @@ private:
     const std::string &Name = CTy.getName();
     uint64_t Size = CTy.getSizeInBits() >> 3;
     unsigned Tag = CTy.getTag();
+    Buffer.setTag(Tag);
     switch (Tag) {
     case DW_TAG_vector_type:
     case DW_TAG_array_type: