3 files changed, 25 insertions, 0 deletions
diff --git a/doc/mrbgems/README.md b/doc/mrbgems/README.md
index 9e930d8b2..fb27aa37b 100644
--- a/doc/mrbgems/README.md
+++ b/doc/mrbgems/README.md
@@ -106,6 +106,21 @@ mrb_c_extension_example_gem_init(mrb_state* mrb) {
 }
 ```
 
+### Finalize
+
+mrbgems expects that you have implemented a C method called
+```mrb_YOURGEMNAME_gem_final(mrb_state)```. ```YOURGEMNAME``` will be replaced
+by the name of your GEM. If you call your GEM *c_extension_example*, your
+finalizer method could look like this:
+
+```
+void
+mrb_c_extension_example_gem_final(mrb_state* mrb) {
+   free(someone);
+}
+```
+
+
 ### Example
 
 ```
diff --git a/doc/mrbgems/c_and_ruby_extension_example/src/example.c b/doc/mrbgems/c_and_ruby_extension_example/src/example.c
index 3d3cb20c9..7651ae5c0 100644
--- a/doc/mrbgems/c_and_ruby_extension_example/src/example.c
+++ b/doc/mrbgems/c_and_ruby_extension_example/src/example.c
@@ -13,3 +13,8 @@ mrb_c_and_ruby_extension_example_gem_init(mrb_state* mrb) {
   struct RClass *class_cextension = mrb_define_module(mrb, "CRubyExtension");
   mrb_define_class_method(mrb, class_cextension, "c_method", mrb_c_method, ARGS_NONE());
 }
+
+void
+mrb_c_and_ruby_extension_example_gem_final(mrb_state* mrb) {
+  // finalizer
+}
diff --git a/doc/mrbgems/c_extension_example/src/example.c b/doc/mrbgems/c_extension_example/src/example.c
index 11f54e6d2..fa166186d 100644
--- a/doc/mrbgems/c_extension_example/src/example.c
+++ b/doc/mrbgems/c_extension_example/src/example.c
@@ -13,3 +13,8 @@ mrb_c_extension_example_gem_init(mrb_state* mrb) {
   struct RClass *class_cextension = mrb_define_module(mrb, "CExtension");
   mrb_define_class_method(mrb, class_cextension, "c_method", mrb_c_method, ARGS_NONE());
 }
+
+void
+mrb_c_extension_example_gem_final(mrb_state* mrb) {
+  // finalizer
+}