Index: include/clang/AST/AttrIterator.h
===================================================================
--- include/clang/AST/AttrIterator.h
+++ include/clang/AST/AttrIterator.h
@@ -39,8 +39,8 @@
 namespace clang {
 
 /// AttrVec - A vector of Attr, which is how they are stored on the AST.
-typedef SmallVector<Attr*, 2> AttrVec;
-typedef SmallVector<const Attr*, 2> ConstAttrVec;
+typedef SmallVector<Attr*, 4> AttrVec;
+typedef SmallVector<const Attr*, 4> ConstAttrVec;
 
 /// specific_attr_iterator - Iterates over a subrange of an AttrVec, only
 /// providing attributes that are of a specific type.