Index: generic/nsfInt.h
===================================================================
diff -u -rf69e0909fcb180e1cbcdd316f0a20de1b254af3d -rfbf70aa67bec4deec1078074787aafb8b66b2dde
--- generic/nsfInt.h	(.../nsfInt.h)	(revision f69e0909fcb180e1cbcdd316f0a20de1b254af3d)
+++ generic/nsfInt.h	(.../nsfInt.h)	(revision fbf70aa67bec4deec1078074787aafb8b66b2dde)
@@ -682,7 +682,9 @@
   Tcl_ObjCmdProc *objInterpProc;
   Tcl_Obj **methodObjNames;
   struct NsfShadowTclCommandInfo *tclCommands;
+#if defined(CHECK_ACTIVATION_COUNTS)
   NsfClasses *cscList;
+#endif
   int errorCount;
   /* these flags could move into a bitarray, but are used only once per interp*/
   int unknown;