diff --git a/homeassistant/components/onewire/sensor.py b/homeassistant/components/onewire/sensor.py
index ef703c99c0f..02de1ed463e 100644
--- a/homeassistant/components/onewire/sensor.py
+++ b/homeassistant/components/onewire/sensor.py
@@ -236,6 +236,11 @@ def get_sensor_types(device_sub_type):
 
 async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
     """Old way of setting up 1-Wire platform."""
+    _LOGGER.warning(
+        "Loading 1-Wire via platform setup is deprecated. "
+        "Please remove it from your configuration"
+    )
+
     if config.get(CONF_HOST):
         config[CONF_TYPE] = CONF_TYPE_OWSERVER
     elif config[CONF_MOUNT_DIR] == DEFAULT_SYSBUS_MOUNT_DIR: