diff --git a/os/hal/boards/ST_STM32H735IG_DISCOVERY/board.h b/os/hal/boards/ST_STM32H735IG_DISCOVERY/board.h
index 22e57ca35..b99269609 100644
--- a/os/hal/boards/ST_STM32H735IG_DISCOVERY/board.h
+++ b/os/hal/boards/ST_STM32H735IG_DISCOVERY/board.h
@@ -626,8 +626,8 @@
                                      PIN_PUPDR_FLOATING(GPIOB_LCD_B7) |     \
                                      PIN_PUPDR_FLOATING(GPIOB_MII_RX_ER) |  \
                                      PIN_PUPDR_FLOATING(GPIOB_MII_TX_EN) |  \
-                                     PIN_PUPDR_PULLUP(GPIOB_RMII_TXD0) |    \
-                                     PIN_PUPDR_PULLUP(GPIOB_RMII_TXD1) |    \
+                                     PIN_PUPDR_FLOATING(GPIOB_RMII_TXD0) |  \
+                                     PIN_PUPDR_FLOATING(GPIOB_RMII_TXD1) |  \
                                      PIN_PUPDR_PULLUP(GPIOB_ARD_D1) |       \
                                      PIN_PUPDR_PULLUP(GPIOB_ARD_D0))
 #define VAL_GPIOB_ODR               (PIN_ODR_LOW(GPIOB_LCD_G1) |            \
diff --git a/os/hal/boards/ST_STM32H735IG_DISCOVERY/cfg/board.chcfg b/os/hal/boards/ST_STM32H735IG_DISCOVERY/cfg/board.chcfg
index 5fd13ed84..bf306d7f0 100644
--- a/os/hal/boards/ST_STM32H735IG_DISCOVERY/cfg/board.chcfg
+++ b/os/hal/boards/ST_STM32H735IG_DISCOVERY/cfg/board.chcfg
@@ -262,7 +262,7 @@
         Type="PushPull"
         Level="High"
         Speed="Maximum"
-        Resistor="PullUp"
+        Resistor="Floating"
         Mode="Alternate"
         Alternate="11" />
       <pin13
@@ -270,9 +270,9 @@
         Type="PushPull"
         Level="High"
         Speed="Maximum"
-        Resistor="PullUp"
+        Resistor="Floating"
         Mode="Alternate"
-        Alternate="11" />
+        Alternate="11" ></pin13>
       <pin14
         ID="ARD_D1"
         Type="PushPull"