Index: library/nx/nx.tcl
===================================================================
diff -u -r3a246dd237252e81aa7f4a37cba2affb0b9ecf00 -r58c1880b874484f218afa0275b0998e25d4282f0
--- library/nx/nx.tcl	(.../nx.tcl)	(revision 3a246dd237252e81aa7f4a37cba2affb0b9ecf00)
+++ library/nx/nx.tcl	(.../nx.tcl)	(revision 58c1880b874484f218afa0275b0998e25d4282f0)
@@ -1216,12 +1216,12 @@
     ${os}::Class::slot::dummy destroy
 
     ::nx::RelationSlot create ${os}::Object::slot::mixin \
-	-forwardername object-mixin -elementtype class
+	-forwardername object-mixin -elementtype mixinspec
     ::nx::RelationSlot create ${os}::Object::slot::filter \
 	-forwardername object-filter
 
     ::nx::RelationSlot create ${os}::Class::slot::mixin \
-	-forwardername class-mixin -elementtype class
+	-forwardername class-mixin -elementtype mixinspec
     ::nx::RelationSlot create ${os}::Class::slot::filter \
         -forwardername class-filter
 
@@ -1230,7 +1230,7 @@
     # of per-object mixins and filters for classes.
     #
     ::nx::ObjectParameterSlot create ${os}::Class::slot::object-mixin \
-	-methodname "::nsf::classes::nx::Object::mixin" -elementtype class
+	-methodname "::nsf::classes::nx::Object::mixin" -elementtype mixinspec
     ::nx::ObjectParameterSlot create ${os}::Class::slot::object-filter \
 	-methodname "::nsf::classes::nx::Object::filter"