diff --git a/static_core/plugins/ets/stdlib/escompat/Array.sts b/static_core/plugins/ets/stdlib/escompat/Array.ets
similarity index 100%
rename from static_core/plugins/ets/stdlib/escompat/Array.sts
rename to static_core/plugins/ets/stdlib/escompat/Array.ets
diff --git a/static_core/plugins/ets/stdlib/escompat/Date.sts b/static_core/plugins/ets/stdlib/escompat/Date.ets
similarity index 100%
rename from static_core/plugins/ets/stdlib/escompat/Date.sts
rename to static_core/plugins/ets/stdlib/escompat/Date.ets
diff --git a/static_core/plugins/ets/stdlib/escompat/json.sts b/static_core/plugins/ets/stdlib/escompat/json.ets
similarity index 100%
rename from static_core/plugins/ets/stdlib/escompat/json.sts
rename to static_core/plugins/ets/stdlib/escompat/json.ets