diff --git a/lib/Interpreter/Transaction.h b/lib/Interpreter/Transaction.h
index 83425de6..9835826e 100644
--- a/lib/Interpreter/Transaction.h
+++ b/lib/Interpreter/Transaction.h
@@ -15,7 +15,7 @@
 
 namespace clang {
   class Decl;
-  class PrintingPolicy;
+  struct PrintingPolicy;
 }
 
 namespace llvm {