1 files changed, 4 insertions, 4 deletions
diff --git a/vm_core.h b/vm_core.h
index 2e8ddfe37f..e9e0f50eb2 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -346,7 +346,7 @@ struct rb_iseq_constant_body {
     } type;              /* instruction sequence type */
 
     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
@@ -414,7 +414,7 @@ struct rb_iseq_constant_body {
 	    int bits_start;
 	    int rest_start;
 	    const ID *table;
-            VALUE *default_values;
+            const VALUE *default_values;
 	} *keyword;
     } param;
 
@@ -433,7 +433,7 @@ struct rb_iseq_constant_body {
     const ID *local_table;		/* must free */
 
     /* catch table */
-    struct iseq_catch_table *catch_table;
+    const struct iseq_catch_table *catch_table;
 
     /* for child iseq */
     const struct rb_iseq_struct *parent_iseq;
@@ -1029,7 +1029,7 @@ typedef struct {
 
 typedef struct {
     VALUE flags; /* imemo header */
-    rb_iseq_t *iseq;
+    const rb_iseq_t *iseq;
     const VALUE *ep;
     const VALUE *env;
     unsigned int env_size;