diff --git a/components/spi.rst b/components/spi.rst
index d6a433ced..8cac04e9c 100644
--- a/components/spi.rst
+++ b/components/spi.rst
@@ -41,6 +41,7 @@ Configuration variables:
 - **clk_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): The pin used for the clock line of the SPI bus.
 - **mosi_pin** (*Optional*, :ref:`Pin Schema <config-pin_schema>`): The pin used for the MOSI line of the SPI bus.
 - **miso_pin** (*Optional*, :ref:`Pin Schema <config-pin_schema>`): The pin used for the MISO line of the SPI bus.
+- **force_sw** (*Optional*, boolean): Whether software implementation should be used even if hardware one is available.
 - **id** (*Optional*, :ref:`config-id`): Manually specify the ID for this SPI hub if you need multiple SPI hubs.
 
 See Also