diff --git a/stmhal/usbd_msc_storage.c b/stmhal/usbd_msc_storage.c
index 0225a2a23c..2c0b29c1db 100644
--- a/stmhal/usbd_msc_storage.c
+++ b/stmhal/usbd_msc_storage.c
@@ -38,7 +38,10 @@
 // These are needed to support removal of the medium, so that the USB drive
 // can be unmounted, and won't be remounted automatically.
 static uint8_t flash_removed = 0;
+
+#if MICROPY_HW_HAS_SDCARD
 static uint8_t sdcard_removed = 0;
+#endif
 
 /******************************************************************************/
 // Callback functions for when the internal flash is the mass storage device