diff --git a/erlang/.gitignore b/erlang/.gitignore
index 7d6d3247..0f7faad4 100644
--- a/erlang/.gitignore
+++ b/erlang/.gitignore
@@ -2,3 +2,4 @@ MANIFEST
 *.beam
 .omakedb*
 *.omc
+*~
\ No newline at end of file
diff --git a/erlang/OMakefile b/erlang/OMakefile
index 89b1c63f..d213444a 100644
--- a/erlang/OMakefile
+++ b/erlang/OMakefile
@@ -30,10 +30,10 @@
 # If so, define the subdirectory targets and uncomment this section.
 #
 
-.DEFAULT: msgpack.beam msgpack.html
+.DEFAULT: msgpack.beam
 
 msgpack.beam: msgpack.erl
-	erlc $<
+	erlc -Wall +debug_info $<
 
 msgpack.html: msgpack.erl
 	erl -noshell -run edoc_run file $<
@@ -41,5 +41,8 @@ msgpack.html: msgpack.erl
 test: msgpack.beam
 	erl -noshell -s msgpack test -s init stop
 
+edoc: msgpack.erl
+	erl -noshell -eval 'ok=edoc:files(["msgpack.erl"], [{dir, "edoc"}]).' -s init stop
+
 clean:
 	-rm -f *.beam *.html
diff --git a/erlang/edoc/.gitignore b/erlang/edoc/.gitignore
new file mode 100644
index 00000000..97f4246c
--- /dev/null
+++ b/erlang/edoc/.gitignore
@@ -0,0 +1,4 @@
+*.html
+*.css
+*.png
+edoc-info
diff --git a/erlang/msgpack.erl b/erlang/msgpack.erl
index aa9851da..a6974834 100644
--- a/erlang/msgpack.erl
+++ b/erlang/msgpack.erl
@@ -18,7 +18,7 @@
 
 %% @doc <a href="http://msgpack.org/">MessagePack</a> codec for Erlang.
 %%
-%%      APIs are almost compatible with <a href="http://msgpack.sourceforge.jp/c:doc">C API</a>
+%%      APIs are almost compatible with <a href="http://redmine.msgpack.org/projects/msgpack/wiki/QuickStartC">C API</a>
 %%      except for buffering functions (both copying and zero-copying), which are unavailable.
 %%
 %%   <table border="1">