Index: generic/nsfDebug.c
===================================================================
diff -u -N -r6af35a888e33da976e283271bb68060f34d91a9a -r5fb947bcc2841847055d78332effcece3d622010
--- generic/nsfDebug.c	(.../nsfDebug.c)	(revision 6af35a888e33da976e283271bb68060f34d91a9a)
+++ generic/nsfDebug.c	(.../nsfDebug.c)	(revision 5fb947bcc2841847055d78332effcece3d622010)
@@ -303,10 +303,10 @@
  *----------------------------------------------------------------------
  */
 
-void NsfMemCountFree(char *id, void *p) nonnull(1);
+void NsfMemCountFree(const char *id, void *p) nonnull(1);
 
 void
-NsfMemCountFree(char *id, void *p) {
+NsfMemCountFree(const char *id, void *p) {
   NsfMemCounter *entry;
   int *tableInitialized;
   Tcl_HashTable *tablePtr = NsfMemCountGetTable(&tableInitialized);
Index: generic/nsfInt.h
===================================================================
diff -u -N -r1aa07d20cab9258b273f984cd694673dfa6a86b8 -r5fb947bcc2841847055d78332effcece3d622010
--- generic/nsfInt.h	(.../nsfInt.h)	(revision 1aa07d20cab9258b273f984cd694673dfa6a86b8)
+++ generic/nsfInt.h	(.../nsfInt.h)	(revision 5fb947bcc2841847055d78332effcece3d622010)
@@ -1064,8 +1064,8 @@
  * MEM Counting
  */
 #ifdef NSF_MEM_COUNT
-void NsfMemCountAlloc(char *id, void *);
-void NsfMemCountFree(char *id, void *);
+void NsfMemCountAlloc(const char *id, void *);
+void NsfMemCountFree(const char *id, void *);
 void NsfMemCountInit(void);
 void NsfMemCountRelease(void);
 #endif /* NSF_MEM_COUNT */