diff --git a/class/msc/usbd_msc.c b/class/msc/usbd_msc.c
index 708f8d09..2ca1a837 100644
--- a/class/msc/usbd_msc.c
+++ b/class/msc/usbd_msc.c
@@ -10,10 +10,6 @@
 #include "usb_osal.h"
 #endif
 
-#ifndef CONFIG_USBDEV_MSC_BLOCK_SIZE
-#define CONFIG_USBDEV_MSC_BLOCK_SIZE 512
-#endif
-
 #define MSC_THREAD_OP_READ_MEM   1
 #define MSC_THREAD_OP_WRITE_MEM  2
 #define MSC_THREAD_OP_WRITE_DONE 3
diff --git a/common/usb_mem.h b/common/usb_mem.h
index 3377ba62..17b8c950 100644
--- a/common/usb_mem.h
+++ b/common/usb_mem.h
@@ -25,13 +25,6 @@ void *usb_hc_malloc_align(size_t align, size_t size);
 
 #endif
 
-#ifndef CONFIG_USB_ALIGN_SIZE
-#define CONFIG_USB_ALIGN_SIZE 4
-#endif
-
-#ifndef USB_NOCACHE_RAM_SECTION
-#define USB_NOCACHE_RAM_SECTION
-#endif
 #define USB_MEM_ALIGNX __attribute__((aligned(CONFIG_USB_ALIGN_SIZE)))
 
 #if (CONFIG_USB_ALIGN_SIZE > 4)