diff --git a/lib/Frontend/PCHReaderDecl.cpp b/lib/Frontend/PCHReaderDecl.cpp
index 865dd97..870392b 100644
--- a/lib/Frontend/PCHReaderDecl.cpp
+++ b/lib/Frontend/PCHReaderDecl.cpp
@@ -454,6 +454,12 @@
       break;
     }
         
+    case Attr::FormatArg: {
+      unsigned FormatIdx = Record[Idx++];
+      New = ::new (*Context) FormatArgAttr(FormatIdx);
+      break;
+    }
+        
     case Attr::Sentinel: {
       int sentinel = Record[Idx++];
       int nullPos = Record[Idx++];