2 files changed, 3 insertions, 3 deletions
diff --git a/perl.h b/perl.h
index 16b0c7c5ef..c241ae64be 100644
--- a/perl.h
+++ b/perl.h
@@ -4637,7 +4637,7 @@ typedef regexp*(CPERLscope(*regdupe_t)) (pTHX_ const regexp* r, CLONE_PARAMS *pa
 
 typedef void (*DESTRUCTORFUNC_NOCONTEXT_t) (void*);
 typedef void (*DESTRUCTORFUNC_t) (pTHX_ void*);
-typedef void (*SVFUNC_t) (pTHX_ SV*);
+typedef void (*SVFUNC_t) (pTHX_ SV* const);
 typedef I32  (*SVCOMPARE_t) (pTHX_ SV*, SV*);
 typedef void (*XSINIT_t) (pTHX);
 typedef void (*ATEXIT_t) (pTHX_ void*);
diff --git a/sv.c b/sv.c
index 3d60e021d6..1ef5e31aa8 100644
--- a/sv.c
+++ b/sv.c
@@ -464,7 +464,7 @@ do_clean_objs(pTHX_ SV *const ref)
 
 #ifndef DISABLE_DESTRUCTOR_KLUDGE
 static void
-do_clean_named_objs(pTHX_ SV *sv)
+do_clean_named_objs(pTHX_ SV *const sv)
 {
     dVAR;
     assert(SvTYPE(sv) == SVt_PVGV);
@@ -11255,7 +11255,7 @@ Perl_ss_dup(pTHX_ PerlInterpreter *proto_perl, CLONE_PARAMS* param)
  * so we know which stashes want their objects cloned */
 
 static void
-do_mark_cloneable_stash(pTHX_ SV *sv)
+do_mark_cloneable_stash(pTHX_ SV *const sv)
 {
     const HEK * const hvname = HvNAME_HEK((HV*)sv);
     if (hvname) {