1 files changed, 6 insertions, 6 deletions

diff --git a/src/vm.c b/src/vm.c
index 689c5b85e..064086fb9 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -920,7 +920,7 @@ argnum_error(mrb_state *mrb, mrb_int num)
 MRB_API mrb_value
 mrb_vm_run(mrb_state *mrb, struct RProc *proc, mrb_value self, unsigned int stack_keep)
 {
-  mrb_irep *irep = proc->body.irep;
+  const mrb_irep *irep = proc->body.irep;
   mrb_value result;
   struct mrb_context *c = mrb->c;
   ptrdiff_t cioff = c->ci - c->cibase;
@@ -965,9 +965,9 @@ mrb_vm_exec(mrb_state *mrb, struct RProc *proc, const mrb_code *pc)
 {
   /* mrb_assert(MRB_PROC_CFUNC_P(proc)) */
   const mrb_code *pc0 = pc;
-  mrb_irep *irep = proc->body.irep;
-  mrb_value *pool = irep->pool;
-  mrb_sym *syms = irep->syms;
+  const mrb_irep *irep = proc->body.irep;
+  const mrb_value *pool = irep->pool;
+  const mrb_sym *syms = irep->syms;
   mrb_code insn;
   int ai = mrb_gc_arena_save(mrb);
   struct mrb_jmpbuf *prev_jmp = mrb->jmp;
@@ -2549,7 +2549,7 @@ RETRY_TRY_BLOCK:
     L_MAKE_LAMBDA:
     {
       struct RProc *p;
-      mrb_irep *nirep = irep->reps[b];
+      const mrb_irep *nirep = irep->reps[b];
 
       if (c & OP_L_CAPTURE) {
         p = mrb_closure_new(mrb, nirep);
@@ -2627,7 +2627,7 @@ RETRY_TRY_BLOCK:
     CASE(OP_EXEC, BB) {
       mrb_value recv = regs[a];
       struct RProc *p;
-      mrb_irep *nirep = irep->reps[b];
+      const mrb_irep *nirep = irep->reps[b];
 
       /* prepare closure */
       p = mrb_proc_new(mrb, nirep);