diff --git a/examples/device/cdc_msc_hid/Makefile b/examples/device/cdc_msc_hid/Makefile
index 4fddc1a1..11c05ad2 100644
--- a/examples/device/cdc_msc_hid/Makefile
+++ b/examples/device/cdc_msc_hid/Makefile
@@ -80,8 +80,7 @@ LIB_SOURCE += \
 	src/class/cdc/cdc_device.c \
 	src/class/hid/hid_device.c \
 	src/tusb.c \
-	src/portable/$(VENDOR)/$(CHIP_FAMILY)/dcd_$(CHIP_FAMILY).c \
-	src/portable/$(VENDOR)/$(CHIP_FAMILY)/hal_$(CHIP_FAMILY).c
+	src/portable/$(VENDOR)/$(CHIP_FAMILY)/dcd_$(CHIP_FAMILY).c
 
 SRC_C += $(LIB_SOURCE)
 
diff --git a/examples/device/cdc_msc_hid/src/msc_disk_ram.c b/examples/device/cdc_msc_hid/src/msc_disk_ram.c
index 477f8ed1..93a863c1 100644
--- a/examples/device/cdc_msc_hid/src/msc_disk_ram.c
+++ b/examples/device/cdc_msc_hid/src/msc_disk_ram.c
@@ -44,7 +44,7 @@
 // Some MCU doesn't have enough 8KB SRAM to store the whole disk
 // We will use Flash as read-only disk
 #if CFG_TUSB_MCU == OPT_MCU_LPC13XX
-#define DISK_READONLY   1
+#define DISK_READONLY
 #endif
 
 #define README_CONTENTS \
@@ -58,7 +58,7 @@ enum
   DISK_BLOCK_SIZE = 512
 };
 
-#if DISK_READONLY
+#ifdef DISK_READONLY
 const
 #endif
 static uint8_t msc_disk[DISK_BLOCK_NUM][DISK_BLOCK_SIZE] =
@@ -120,7 +120,7 @@ int32_t tud_msc_write10_cb(uint8_t lun, uint32_t lba, uint32_t offset, uint8_t*
 {
   (void) lun;
 
-#if !DISK_READONLY
+#ifndef DISK_READONLY
   uint8_t* addr = msc_disk[lba] + offset;
   memcpy(addr, buffer, bufsize);
 #endif
diff --git a/examples/device/cdc_msc_hid_freertos/src/msc_disk_ram.c b/examples/device/cdc_msc_hid_freertos/src/msc_disk_ram.c
index 645cbc87..03a87043 100644
--- a/examples/device/cdc_msc_hid_freertos/src/msc_disk_ram.c
+++ b/examples/device/cdc_msc_hid_freertos/src/msc_disk_ram.c
@@ -44,7 +44,7 @@
 // Some MCU doesn't have enough 8KB SRAM to store the whole disk
 // We will use Flash as read-only disk
 #if CFG_TUSB_MCU == OPT_MCU_LPC13XX
-#define DISK_READONLY   1
+#define DISK_READONLY
 #endif
 
 #define README_CONTENTS \
@@ -58,7 +58,7 @@ enum
   DISK_BLOCK_SIZE = 512
 };
 
-#if DISK_READONLY
+#ifdef DISK_READONLY
 const
 #endif
 static uint8_t msc_disk[DISK_BLOCK_NUM][DISK_BLOCK_SIZE] =
@@ -120,7 +120,7 @@ int32_t tud_msc_write10_cb(uint8_t lun, uint32_t lba, uint32_t offset, uint8_t*
 {
   (void) lun;
 
-#if !DISK_READONLY
+#ifndef DISK_READONLY
   uint8_t* addr = msc_disk[lba] + offset;
   memcpy(addr, buffer, bufsize);
 #endif