--- a/libinterp/octave-value/ov-classdef.cc	Sat Jun 27 12:01:33 2020 +0200
+++ b/libinterp/octave-value/ov-classdef.cc	Mon Jun 29 15:12:39 2020 -0400
@@ -437,15 +437,10 @@
       if (meth_name.empty ())
         return cls.doc_string ();
 
-      octave_value ov_meth = cls.get_method (meth_name);
+      octave::cdef_method cdef_meth = cls.find_method (meth_name);
 
-      if (ov_meth.is_defined ())
-        {
-          octave_function *fcn = ov_meth.function_value ();
-
-          if (fcn)
-            return fcn->doc_string ();
-        }
+      if (cdef_meth.ok ())
+        return cdef_meth.get_doc_string ();
     }
 
   return "";