diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index efc37f7..b7b0a04 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -1878,6 +1878,10 @@
 Stmt::child_iterator ObjCSuperExpr::child_begin() { return child_iterator(); }
 Stmt::child_iterator ObjCSuperExpr::child_end() { return child_iterator(); }
 
+// ObjCIsaExpr
+Stmt::child_iterator ObjCIsaExpr::child_begin() { return &Base; }
+Stmt::child_iterator ObjCIsaExpr::child_end() { return &Base+1; }
+
 // PredefinedExpr
 Stmt::child_iterator PredefinedExpr::child_begin() { return child_iterator(); }
 Stmt::child_iterator PredefinedExpr::child_end() { return child_iterator(); }
diff --git a/lib/AST/StmtPrinter.cpp b/lib/AST/StmtPrinter.cpp
index 26732d4..a5b0df8 100644
--- a/lib/AST/StmtPrinter.cpp
+++ b/lib/AST/StmtPrinter.cpp
@@ -739,6 +739,11 @@
   // representing anonymous unions/structs
   OS << Node->getMemberDecl()->getNameAsString();
 }
+void StmtPrinter::VisitObjCIsaExpr(ObjCIsaExpr *Node) {
+  PrintExpr(Node->getBase());
+  OS << (Node->isArrow() ? "->isa" : ".isa");
+}
+
 void StmtPrinter::VisitExtVectorElementExpr(ExtVectorElementExpr *Node) {
   PrintExpr(Node->getBase());
   OS << ".";