diff --git a/Marlin/Configuration_adv.h b/Marlin/Configuration_adv.h
index 37d21ec13..dfc985d7a 100644
--- a/Marlin/Configuration_adv.h
+++ b/Marlin/Configuration_adv.h
@@ -1749,6 +1749,9 @@
    *       1 | HIGH | LOW
    *       2 | LOW  | HIGH
    *       3 | HIGH | HIGH
+   *
+   * Set *_SERIAL_TX_PIN and *_SERIAL_RX_PIN to match for all drivers
+   * on the same serial port, either here or in your board's pins file.
    */
   #define  X_SLAVE_ADDRESS 0
   #define  Y_SLAVE_ADDRESS 0
diff --git a/config/examples/FYSETC/Cheetah 1.2/BLTouch/Configuration_adv.h b/config/examples/FYSETC/Cheetah 1.2/BLTouch/Configuration_adv.h
index 99a9c517a..2fedb22ba 100644
--- a/config/examples/FYSETC/Cheetah 1.2/BLTouch/Configuration_adv.h	
+++ b/config/examples/FYSETC/Cheetah 1.2/BLTouch/Configuration_adv.h	
@@ -1749,6 +1749,9 @@
    *       1 | HIGH | LOW
    *       2 | LOW  | HIGH
    *       3 | HIGH | HIGH
+   *
+   * Set *_SERIAL_TX_PIN and *_SERIAL_RX_PIN to match for all drivers
+   * on the same serial port, either here or in your board's pins file.
    */
   #define  X_SLAVE_ADDRESS 0
   #define  Y_SLAVE_ADDRESS 1
diff --git a/config/examples/FYSETC/Cheetah 1.2/base/Configuration_adv.h b/config/examples/FYSETC/Cheetah 1.2/base/Configuration_adv.h
index 99a9c517a..2fedb22ba 100644
--- a/config/examples/FYSETC/Cheetah 1.2/base/Configuration_adv.h	
+++ b/config/examples/FYSETC/Cheetah 1.2/base/Configuration_adv.h	
@@ -1749,6 +1749,9 @@
    *       1 | HIGH | LOW
    *       2 | LOW  | HIGH
    *       3 | HIGH | HIGH
+   *
+   * Set *_SERIAL_TX_PIN and *_SERIAL_RX_PIN to match for all drivers
+   * on the same serial port, either here or in your board's pins file.
    */
   #define  X_SLAVE_ADDRESS 0
   #define  Y_SLAVE_ADDRESS 1