1 files changed, 1 insertions, 1 deletions
diff --git a/src/vm.c b/src/vm.c
index 9b501808b..4d3ab720a 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -875,7 +875,7 @@ break_tag_p(struct RBreak *brk, uint32_t tag)
 }
 
 static void
-prepare_tagged_break(mrb_state *mrb, uint32_t tag, struct RProc *proc, mrb_value val)
+prepare_tagged_break(mrb_state *mrb, uint32_t tag, const struct RProc *proc, mrb_value val)
 {
   if (break_tag_p((struct RBreak*)mrb->exc, tag)) {
     mrb_break_tag_set((struct RBreak*)mrb->exc, tag);