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-rw-r--r--include/ruby/intern.h2
-rw-r--r--include/ruby/ruby.h4
2 files changed, 3 insertions, 3 deletions
diff --git a/include/ruby/intern.h b/include/ruby/intern.h
index b95f2d02d3..7de34b1e8d 100644
--- a/include/ruby/intern.h
+++ b/include/ruby/intern.h
@@ -583,7 +583,7 @@ VALUE rb_struct_iv_get(VALUE, const char*);
VALUE rb_struct_s_members(VALUE);
VALUE rb_struct_members(VALUE);
VALUE rb_struct_alloc_noinit(VALUE);
-VALUE rb_struct_define_without_accessor(char *, VALUE, rb_alloc_func_t, ...);
+VALUE rb_struct_define_without_accessor(const char *, VALUE, rb_alloc_func_t, ...);
/* thread.c */
typedef void rb_unblock_function_t(void *);
typedef VALUE rb_blocking_function_t(void *);
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index 307bd1c820..db6f98023a 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -778,8 +778,8 @@ VALUE rb_id2str(ID);
rb_intern(str))
#endif
-char *rb_class2name(VALUE);
-char *rb_obj_classname(VALUE);
+const char *rb_class2name(VALUE);
+const char *rb_obj_classname(VALUE);
void rb_p(VALUE);