diff --git a/Marlin/src/pins/stm32f4/pins_FYSETC_S6.h b/Marlin/src/pins/stm32f4/pins_FYSETC_S6.h
index 0e0266f1a4..dfcb4217c9 100644
--- a/Marlin/src/pins/stm32f4/pins_FYSETC_S6.h
+++ b/Marlin/src/pins/stm32f4/pins_FYSETC_S6.h
@@ -128,7 +128,7 @@
     #define Y_SERIAL_TX_PIN                 PE14
   #endif
   #ifndef Y_SERIAL_RX_PIN
-    #define Y_SERIAL_RX_PIN                 PC4
+    #define Y_SERIAL_RX_PIN                 PE13
   #endif
   #ifndef Z_SERIAL_TX_PIN
     #define Z_SERIAL_TX_PIN                 PD11
diff --git a/Marlin/src/pins/stm32f4/pins_FYSETC_S6_V2_0.h b/Marlin/src/pins/stm32f4/pins_FYSETC_S6_V2_0.h
index 6f1c9be8f5..a9ce1383d8 100644
--- a/Marlin/src/pins/stm32f4/pins_FYSETC_S6_V2_0.h
+++ b/Marlin/src/pins/stm32f4/pins_FYSETC_S6_V2_0.h
@@ -39,11 +39,17 @@
 
 #if HAS_TMC_UART
   #define X_SERIAL_TX_PIN                   PE8
+  #define X_SERIAL_RX_PIN                   PE8
   #define Y_SERIAL_TX_PIN                   PC4
+  #define Y_SERIAL_RX_PIN                   PC4
   #define Z_SERIAL_TX_PIN                   PD12
+  #define Z_SERIAL_RX_PIN                   PD12
   #define E0_SERIAL_TX_PIN                  PA15
+  #define E0_SERIAL_RX_PIN                  PA15
   #define E1_SERIAL_TX_PIN                  PC5
+  #define E1_SERIAL_RX_PIN                  PC5
   #define E2_SERIAL_TX_PIN                  PE0
+  #define E2_SERIAL_RX_PIN                  PE0
 #endif
 
 //