diff --git a/rebar.config b/rebar.config
index e69de29..c59e185 100644
--- a/rebar.config
+++ b/rebar.config
@@ -0,0 +1,2 @@
+% uncomment to disable encoding support for erlang maps
+% {jsx_nomaps, true}.
\ No newline at end of file
diff --git a/rebar.config.script b/rebar.config.script
index a9a0f2b..c1e9325 100644
--- a/rebar.config.script
+++ b/rebar.config.script
@@ -1,4 +1,4 @@
-case os:getenv("JSX_NOMAPS") of
+case os:getenv("JSX_NOMAPS") or proplists:get_value(jsx_nomaps, CONFIG, false) of
   false ->
     try file:script("config/maps") of
       {ok, true} -> [{erl_opts, [{d, release_supports_maps}]}] ++ CONFIG;