diff --git a/src/drivers/boards/px4fmu-v5/board_config.h b/src/drivers/boards/px4fmu-v5/board_config.h
index 393d01edd2..dfab460423 100644
--- a/src/drivers/boards/px4fmu-v5/board_config.h
+++ b/src/drivers/boards/px4fmu-v5/board_config.h
@@ -425,7 +425,7 @@ __BEGIN_DECLS
  *
  * PA9  OTG_FS_VBUS VBUS sensing
  */
-#define GPIO_OTGFS_VBUS         /* PA9 */ (GPIO_INPUT|GPIO_FLOAT|GPIO_SPEED_100MHz|GPIO_PORTA|GPIO_PIN9)
+#define GPIO_OTGFS_VBUS         /* PA9 */ (GPIO_INPUT|GPIO_PULLDOWN|GPIO_SPEED_100MHz|GPIO_PORTA|GPIO_PIN9)
 
 /* High-resolution timer */
 #define HRT_TIMER		     8  /* use timer8 for the HRT */
diff --git a/src/drivers/boards/px4fmu-v5/px4fmu_init.c b/src/drivers/boards/px4fmu-v5/px4fmu_init.c
index 952b1754e9..85089665b5 100644
--- a/src/drivers/boards/px4fmu-v5/px4fmu_init.c
+++ b/src/drivers/boards/px4fmu-v5/px4fmu_init.c
@@ -229,10 +229,9 @@ stm32_boardinitialize(void)
 
 	stm32_spiinitialize();
 
-	/* Power on the SD Card */
-
-	SD_CARD_POWER_CTRL(true);
+	/* configure USB interfaces */
 
+	stm32_usbinitialize();
 
 }