diff --git a/rebar.config.script b/rebar.config.script
index 02efadf..8e9493f 100644
--- a/rebar.config.script
+++ b/rebar.config.script
@@ -1,6 +1,6 @@
 application:start(compiler),
-case {erlang:system_info(version), application:get_key(compiler, vsn)} of
-    {X, {ok, Y}} when X >= "6.0" andalso Y >= "5.0" ->
+case {erlang:system_info(version), application:get_key(compiler, vsn), os:getenv("JSX_NO_MAPS")} of
+    {X, {ok, Y}, false} when X >= "6.0" andalso Y >= "5.0" ->
         CONFIG ++ [{erl_opts, [{d, release_supports_maps}]}];
     _ -> CONFIG
 end.
\ No newline at end of file