Index: generic/nsfPointer.c
===================================================================
diff -u -N -re48161ab167236344f7d23da3e855c31d1a1ebc7 -r9f2bb394fca71a456c6e9e8135e493625f8edecf
--- generic/nsfPointer.c	(.../nsfPointer.c)	(revision e48161ab167236344f7d23da3e855c31d1a1ebc7)
+++ generic/nsfPointer.c	(.../nsfPointer.c)	(revision 9f2bb394fca71a456c6e9e8135e493625f8edecf)
@@ -153,10 +153,10 @@
  *
  *----------------------------------------------------------------------
  */
-static Tcl_HashEntry * Nsf_PointerGetHptr(void *valuePtr) nonnull(1);
+static Tcl_HashEntry * Nsf_PointerGetHptr(const void *valuePtr) nonnull(1);
 
 static Tcl_HashEntry *
-Nsf_PointerGetHptr(void *valuePtr) {
+Nsf_PointerGetHptr(const void *valuePtr) {
   Tcl_HashEntry *hPtr;
   Tcl_HashSearch hSrch;