diff --git a/lib/Sema/Sema.cpp b/lib/Sema/Sema.cpp
index 7c0006b..569f4ed 100644
--- a/lib/Sema/Sema.cpp
+++ b/lib/Sema/Sema.cpp
@@ -371,7 +371,7 @@
   }
   
   // Output warning for unused file scoped decls.
-  for (std::vector<const DeclaratorDecl*>::iterator
+  for (llvm::SmallVectorImpl<const DeclaratorDecl*>::iterator
          I = UnusedFileScopedDecls.begin(),
          E = UnusedFileScopedDecls.end(); I != E; ++I) {
     if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*I)) {