1 files changed, 1 insertions, 1 deletions
diff --git a/kernel.rb b/kernel.rb
index 888ef0c531..5d596c8892 100644
--- a/kernel.rb
+++ b/kernel.rb
@@ -17,7 +17,7 @@ module Kernel
   #
   def class
     Primitive.attr! :leaf
-    Primitive.cexpr! 'rb_obj_class(self)'
+    Primitive.cexpr! 'rb_obj_class_must(self)'
   end
 
   #