diff --git a/lib/Sema/SemaTemplateInstantiate.cpp b/lib/Sema/SemaTemplateInstantiate.cpp
index 19c257d..0d6acd0 100644
--- a/lib/Sema/SemaTemplateInstantiate.cpp
+++ b/lib/Sema/SemaTemplateInstantiate.cpp
@@ -917,6 +917,8 @@
   } else if (Expr *Arg = OldParm->getDefaultArg())
     NewParm->setUninstantiatedDefaultArg(Arg);
 
+  NewParm->setHasInheritedDefaultArg(OldParm->hasInheritedDefaultArg());
+
   SemaRef.CurrentInstantiationScope->InstantiatedLocal(OldParm, NewParm);
   return NewParm;
 }