diff --git a/docs/source/api.rst b/docs/source/api.rst
index bc179bc0..def1bd41 100644
--- a/docs/source/api.rst
+++ b/docs/source/api.rst
@@ -19,10 +19,10 @@ Information regarding the API of CRSF for Arduino is coming soon.
 
     Constructor with pin numbers.
 
-.. var:: uint8_t RxPin
+.. arg:: uint8_t RxPin
 
     UART Rx pin.
 
-.. var:: uint8_t TxPin
+.. arg:: uint8_t TxPin
 
     UART Tx pin.