diff --git a/ports/stm32/mpconfigport.h b/ports/stm32/mpconfigport.h
index c6ba83d1b..dc0a767fb 100644
--- a/ports/stm32/mpconfigport.h
+++ b/ports/stm32/mpconfigport.h
@@ -157,7 +157,7 @@
 #endif
 
 // fatfs configuration used in ffconf.h
-#define MICROPY_FATFS_ENABLE_LFN       (1)
+#define MICROPY_FATFS_ENABLE_LFN       (2)
 #define MICROPY_FATFS_LFN_CODE_PAGE    437 /* 1=SFN/ANSI 437=LFN/U.S.(OEM) */
 #define MICROPY_FATFS_USE_LABEL        (1)
 #define MICROPY_FATFS_RPATH            (2)