diff --git a/llvm/lib/Target/TargetData.cpp b/llvm/lib/Target/TargetData.cpp
index 63c5b61..e199f44 100644
--- a/llvm/lib/Target/TargetData.cpp
+++ b/llvm/lib/Target/TargetData.cpp
@@ -217,7 +217,7 @@
     Size = AlignedSize*PTy->getNumElements();
     // FIXME: The alignments of specific packed types are target dependent.
     // For now, just set it to be equal to Size.
-    Alignment = Size;
+    Alignment = (Size+7)/8;
     return;
   }
   case Type::StructTyID: {