diff --git a/mrbgems/mruby-io/src/mruby_io_gem.c b/mrbgems/mruby-io/src/mruby_io_gem.c
index 87b7e8aac..4e01442a2 100644
--- a/mrbgems/mruby-io/src/mruby_io_gem.c
+++ b/mrbgems/mruby-io/src/mruby_io_gem.c
@@ -1,4 +1,5 @@
 #include <mruby.h>
+#include <io_hal.h>
 
 void mrb_init_io(mrb_state *mrb);
 void mrb_init_file(mrb_state *mrb);
@@ -9,6 +10,7 @@ void mrb_init_file_test(mrb_state *mrb);
 void
 mrb_mruby_io_gem_init(mrb_state* mrb)
 {
+  mrb_hal_io_init(mrb);
   mrb_init_io(mrb); DONE;
   mrb_init_file(mrb); DONE;
   mrb_init_file_test(mrb); DONE;
@@ -18,4 +20,5 @@ mrb_mruby_io_gem_init(mrb_state* mrb)
 void
 mrb_mruby_io_gem_final(mrb_state* mrb)
 {
+  mrb_hal_io_final(mrb);
 }