diff --git a/src/vim9.h b/src/vim9.h
index f1c4530..faf2650 100644
--- a/src/vim9.h
+++ b/src/vim9.h
@@ -122,6 +122,7 @@
     ISN_NEWFUNC,    // create a global function from a lambda function
     ISN_DEF,	    // list functions
     ISN_DEFER,	    // :defer  argument count is isn_arg.number
+    ISN_DEFEROBJ,   // idem, function is an object method
 
     // expression operations
     ISN_JUMP,	    // jump if condition is matched isn_arg.jump