diff --git a/esphomeyaml/components/sensor/ultrasonic.py b/esphomeyaml/components/sensor/ultrasonic.py
index 1144bf8421..3ea86fb0d8 100644
--- a/esphomeyaml/components/sensor/ultrasonic.py
+++ b/esphomeyaml/components/sensor/ultrasonic.py
@@ -11,7 +11,7 @@ from esphomeyaml.helpers import App, add, variable, gpio_output_pin_expression,
 PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
     cv.GenerateID('ultrasonic'): cv.register_variable_id,
     vol.Required(CONF_TRIGGER_PIN): pins.GPIO_OUTPUT_PIN_SCHEMA,
-    vol.Required(CONF_ECHO_PIN): pins.GPIO_INPUT_PIN_SCHEMA,
+    vol.Required(CONF_ECHO_PIN): pins.GPIO_INTERNAL_INPUT_PIN_SCHEMA,
     vol.Exclusive(CONF_TIMEOUT_METER, 'timeout'): cv.positive_float,
     vol.Exclusive(CONF_TIMEOUT_TIME, 'timeout'): cv.positive_time_period_microseconds,
     vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,