diff --git a/drivers/include/mtd_default.h b/drivers/include/mtd_default.h
index fff6376a2e..6ad168c8c6 100644
--- a/drivers/include/mtd_default.h
+++ b/drivers/include/mtd_default.h
@@ -55,6 +55,8 @@ extern "C" {
  */
 #define MTD_NUMOF           (MTD_BOARD_NUMOF + MTD_SDCARD_NUMOF + MTD_EMULATED_NUMOF)
 
+#else
+#define MTD_BOARD_NUMOF     MTD_NUMOF
 #endif /*  !defined(MTD_NUMOF) && !DOXYGEN */
 
 #if !DOXYGEN