Index: generic/nsf.c
===================================================================
diff -u -N -rcbcfec72376d549a806859c873195cc0ebc9c9ea -rc0828ca7faac0ea7ebf189685a47c3163e966f7a
--- generic/nsf.c	(.../nsf.c)	(revision cbcfec72376d549a806859c873195cc0ebc9c9ea)
+++ generic/nsf.c	(.../nsf.c)	(revision c0828ca7faac0ea7ebf189685a47c3163e966f7a)
@@ -26169,7 +26169,7 @@
       CmdListAddSorted(&nclopt->isClassMixinOf, cl->object.id, NULL);
     } else {
       NsfLog(interp, NSF_LOG_WARN,
-             "Problem registering %s as a mixin of %s\n",
+             "Problem registering %s as a class mixin of %s\n",
              ObjStr(valueObj), ClassName(cl));
     }
   }
@@ -26357,13 +26357,14 @@
 
       for (cmds = newMixinCmdList; cmds; cmds = cmds->nextPtr) {
         NsfObject *nObject = NsfGetObjectFromCmdPtr(cmds->cmdPtr);
+
         if (nObject) {
           nclopt = NsfRequireClassOpt((NsfClass *) nObject);
           CmdListAddSorted(&nclopt->isObjectMixinOf, object->id, NULL);
         } else {
           NsfLog(interp, NSF_LOG_WARN,
-                 "Problem registering %s as a mixin of %s\n",
-                 ObjStr(valueObj), ClassName(cl));
+                 "Problem registering %s as a object mixin of %s\n",
+                 ObjStr(valueObj), ObjectName(object));
         }
       }