diff --git a/include/llvm/IR/DataLayout.h b/include/llvm/IR/DataLayout.h
index bfdb057..73d9c4f 100644
--- a/include/llvm/IR/DataLayout.h
+++ b/include/llvm/IR/DataLayout.h
@@ -172,6 +172,7 @@
   DataLayout(const DataLayout &TD) :
     ImmutablePass(ID),
     LittleEndian(TD.isLittleEndian()),
+    StackNaturalAlign(TD.StackNaturalAlign),
     LegalIntWidths(TD.LegalIntWidths),
     Alignments(TD.Alignments),
     Pointers(TD.Pointers),