diff --git a/include/clang/Sema/ScopeInfo.h b/include/clang/Sema/ScopeInfo.h
index a48422a..103ce82 100644
--- a/include/clang/Sema/ScopeInfo.h
+++ b/include/clang/Sema/ScopeInfo.h
@@ -529,6 +529,7 @@
     case CR_Default:
       return "default captured statement";
     }
+    llvm_unreachable("Invalid captured region kind!");
   }
 
   static bool classof(const FunctionScopeInfo *FSI) {