diff --git a/lib/AST/DeclCXX.cpp b/lib/AST/DeclCXX.cpp
index 56d0456..174e8b6 100644
--- a/lib/AST/DeclCXX.cpp
+++ b/lib/AST/DeclCXX.cpp
@@ -454,7 +454,7 @@
   //   A default constructor for a class X is a constructor of class
   //   X that can be called without an argument.
   return (getNumParams() == 0) ||
-         (getNumParams() > 0 && getParamDecl(0)->getDefaultArg() != 0);
+         (getNumParams() > 0 && getParamDecl(0)->hasDefaultArg());
 }
 
 bool