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-rw-r--r--shared-bindings/analogio/AnalogIn.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/shared-bindings/analogio/AnalogIn.c b/shared-bindings/analogio/AnalogIn.c
index 2cda9355a..328466b0d 100644
--- a/shared-bindings/analogio/AnalogIn.c
+++ b/shared-bindings/analogio/AnalogIn.c
@@ -124,7 +124,7 @@ const mp_obj_property_t analogio_analogin_value_obj = {
(mp_obj_t)&mp_const_none_obj},
};
-//| reference_voltage: Optional[float]
+//| reference_voltage: float
//| """The maximum voltage measurable (also known as the reference voltage) as a
//| `float` in Volts."""
//|