diff --git a/drivers/mtd_sdmmc/mtd_sdmmc.c b/drivers/mtd_sdmmc/mtd_sdmmc.c
index 624c95f250..ab0881af0d 100644
--- a/drivers/mtd_sdmmc/mtd_sdmmc.c
+++ b/drivers/mtd_sdmmc/mtd_sdmmc.c
@@ -235,7 +235,7 @@ const mtd_desc_t mtd_sdmmc_driver = {
         .sdmmc_idx = n,                     \
     };                                      \
                                             \
-    mtd_dev_t CONCAT(*mtd, m) = (mtd_dev_t *)&mtd_sdmmc_dev ##n
+    XFA_CONST(mtd_dev_xfa, m) mtd_dev_t CONCAT(*mtd, m) = (mtd_dev_t *)&mtd_sdmmc_dev ## n
 
 #if IS_USED(MODULE_MTD_SDCARD_DEFAULT)
 /* we use /sd1 as default mount point for coexistence with mtd_sdcard */