Index: generic/nsf.c
===================================================================
diff -u -N -r3301d2725d88fb4bd485ef4024f4fb31eea65c9e -r7f58a3a3dd12990de3dfc8096a85d2341cf02075
--- generic/nsf.c	(.../nsf.c)	(revision 3301d2725d88fb4bd485ef4024f4fb31eea65c9e)
+++ generic/nsf.c	(.../nsf.c)	(revision 7f58a3a3dd12990de3dfc8096a85d2341cf02075)
@@ -25734,6 +25734,24 @@
 }
 
 /*
+cmd "definitionnamespace" NsfDefinitionNamespaceCmd {
+}
+*/
+static int
+NsfDefinitionNamespaceCmd(Tcl_Interp *interp)
+{
+  Tcl_Namespace *nsPtr;
+
+  nonnull_assert(interp != NULL);
+
+  nsPtr = CallingNameSpace(interp);
+  Tcl_SetObjResult(interp, Tcl_NewStringObj(nsPtr->fullName, -1));
+
+  return TCL_OK;
+}
+
+
+/*
 cmd "directdispatch" NsfDirectDispatchCmd {
   {-argName "object" -required 1 -type object}
   {-argName "-frame" -required 0 -nrargs 1 -type "method|object|default" -default "default"}