1 files changed, 1 insertions, 1 deletions
diff --git a/sv.h b/sv.h
index 2799cd530d..693cc3268a 100644
--- a/sv.h
+++ b/sv.h
@@ -270,7 +270,7 @@ struct xpvfm {
     HV *	xcv_stash;
     OP *	xcv_start;
     OP *	xcv_root;
-    void      (*xcv_xsub)_((CV*));
+    void      (*xcv_xsub)_((CV* _CPERLproto));
     ANY		xcv_xsubany;
     GV *	xcv_gv;
     GV *	xcv_filegv;