1 files changed, 1 insertions, 1 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*);