diff --git a/AST/Expr.cpp b/AST/Expr.cpp
index 1ef93f5..4505fec 100644
--- a/AST/Expr.cpp
+++ b/AST/Expr.cpp
@@ -322,6 +322,8 @@
     if (cast<OCUVectorElementExpr>(this)->containsDuplicateElements())
       return LV_DuplicateVectorComponents;
     return LV_Valid;
+  case ObjCIvarRefExprClass: // ObjC instance variables are lvalues.
+    return LV_Valid;
   default:
     break;
   }