diff --git a/src/structs.h b/src/structs.h
index 9214096..4a82c82 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1791,8 +1791,11 @@
     def_status_T uf_def_status; // UF_NOT_COMPILED, UF_TO_BE_COMPILED, etc.
     int		uf_dfunc_idx;	// only valid if uf_def_status is UF_COMPILED
 
-    class_T	*uf_class;	// for object method and constructor; does not
-				// count for class_refcount
+    class_T	*uf_class;	// for class/object method and constructor;
+				// does not count for class_refcount.
+				// class of the object which is invoking this
+				// function.
+    class_T	*uf_defclass;	// class where this function is defined.
 
     garray_T	uf_args;	// arguments, including optional arguments
     garray_T	uf_def_args;	// default argument expressions