Index: generic/nsf.c
===================================================================
diff -u -r6d563e2003f5211b60672e303dce053699644995 -r03b838a7c3ffc5854115254d5dc2e3f90223eda4
--- generic/nsf.c	(.../nsf.c)	(revision 6d563e2003f5211b60672e303dce053699644995)
+++ generic/nsf.c	(.../nsf.c)	(revision 03b838a7c3ffc5854115254d5dc2e3f90223eda4)
@@ -15433,6 +15433,9 @@
     }
     INCR_REF_COUNT(paramPtr->method);
 
+  } else if (strncmp(option, "virtualobjectargs", 17) == 0 ||
+             strncmp(option, "virtualclassargs", 16) == 0) {
+    result = ParamOptionSetConverter(interp, paramPtr, option, ConvertToNothing);
   } else {
     Tcl_DString ds, *dsPtr = &ds;