diff --git a/examples/device/msc_dual_lun/src/msc_disk_dual.c b/examples/device/msc_dual_lun/src/msc_disk_dual.c
index 4baf13fc5..faa90ee7b 100644
--- a/examples/device/msc_dual_lun/src/msc_disk_dual.c
+++ b/examples/device/msc_dual_lun/src/msc_disk_dual.c
@@ -31,7 +31,7 @@
 // Some MCU doesn't have enough 8KB SRAM to store the whole disk
 // We will use Flash as read-only disk
 // - LPC1347, LPC11uxx
-#if (CFG_TUSB_MCU == OPT_MCU_LPC13XX) || (CFG_TUSB_MCU == OPT_MCU_LPC11UXX)
+#if (CFG_TUSB_MCU == OPT_MCU_LPC13XX) || (CFG_TUSB_MCU == OPT_MCU_LPC11UXX) || defined(STM32F070xB)
 #define DISK_READONLY
 #endif