1 files changed, 2 insertions, 2 deletions
diff --git a/vm_core.h b/vm_core.h
index b266e3882a..e470e164db 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -255,7 +255,7 @@ struct rb_iseq_constant_body {
     int local_size;
 
     unsigned int iseq_size;
-    VALUE *iseq_encoded; /* encoded iseq (insn addr and operands) */
+    const VALUE *iseq_encoded; /* encoded iseq (insn addr and operands) */
 
     /**
      * parameter information
@@ -536,7 +536,7 @@ typedef struct rb_vm_struct {
 #endif
 
 typedef struct rb_control_frame_struct {
-    VALUE *pc;			/* cfp[0] */
+    const VALUE *pc;		/* cfp[0] */
     VALUE *sp;			/* cfp[1] */
     const rb_iseq_t *iseq;	/* cfp[2] */
     VALUE flag;			/* cfp[3] */