diff --git a/examples/device/cdc_msc/src/tusb_config.h b/examples/device/cdc_msc/src/tusb_config.h
index ff7fafd8..e307870e 100644
--- a/examples/device/cdc_msc/src/tusb_config.h
+++ b/examples/device/cdc_msc/src/tusb_config.h
@@ -68,8 +68,9 @@
 //--------------------------------------------------------------------
 // DEVICE CONFIGURATION
 //--------------------------------------------------------------------
-
+#ifndef CFG_TUD_ENDOINT0_SIZE
 #define CFG_TUD_ENDOINT0_SIZE    64
+#endif
 
 //------------- CLASS -------------//
 #define CFG_TUD_CDC              1
diff --git a/examples/device/cdc_msc_hid_freertos/src/tusb_config.h b/examples/device/cdc_msc_hid_freertos/src/tusb_config.h
index bb31eac0..7869e24c 100644
--- a/examples/device/cdc_msc_hid_freertos/src/tusb_config.h
+++ b/examples/device/cdc_msc_hid_freertos/src/tusb_config.h
@@ -1,4 +1,4 @@
-/* 
+/*
  * The MIT License (MIT)
  *
  * Copyright (c) 2019 Ha Thach (tinyusb.org)
@@ -69,7 +69,9 @@
 // DEVICE CONFIGURATION
 //--------------------------------------------------------------------
 
+#ifndef CFG_TUD_ENDOINT0_SIZE
 #define CFG_TUD_ENDOINT0_SIZE    64
+#endif
 
 //------------- CLASS -------------//
 #define CFG_TUD_CDC              1
diff --git a/examples/device/hid_composite/src/tusb_config.h b/examples/device/hid_composite/src/tusb_config.h
index 57fcbd59..13ecfa41 100644
--- a/examples/device/hid_composite/src/tusb_config.h
+++ b/examples/device/hid_composite/src/tusb_config.h
@@ -69,7 +69,9 @@
 // DEVICE CONFIGURATION
 //--------------------------------------------------------------------
 
-#define CFG_TUD_ENDOINT0_SIZE   64
+#ifndef CFG_TUD_ENDOINT0_SIZE
+#define CFG_TUD_ENDOINT0_SIZE    64
+#endif
 
 //------------- CLASS -------------//
 #define CFG_TUD_HID             1
diff --git a/examples/device/hid_generic_inout/src/tusb_config.h b/examples/device/hid_generic_inout/src/tusb_config.h
index c55529fc..c82588c2 100644
--- a/examples/device/hid_generic_inout/src/tusb_config.h
+++ b/examples/device/hid_generic_inout/src/tusb_config.h
@@ -69,7 +69,9 @@
 // DEVICE CONFIGURATION
 //--------------------------------------------------------------------
 
-#define CFG_TUD_ENDOINT0_SIZE   64
+#ifndef CFG_TUD_ENDOINT0_SIZE
+#define CFG_TUD_ENDOINT0_SIZE    64
+#endif
 
 //------------- CLASS -------------//
 #define CFG_TUD_CDC             0
diff --git a/examples/device/midi_test/src/tusb_config.h b/examples/device/midi_test/src/tusb_config.h
index d588b4df..4a84812c 100644
--- a/examples/device/midi_test/src/tusb_config.h
+++ b/examples/device/midi_test/src/tusb_config.h
@@ -69,7 +69,9 @@
 // DEVICE CONFIGURATION
 //--------------------------------------------------------------------
 
-#define CFG_TUD_ENDOINT0_SIZE     64
+#ifndef CFG_TUD_ENDOINT0_SIZE
+#define CFG_TUD_ENDOINT0_SIZE    64
+#endif
 
 //------------- CLASS -------------//
 #define CFG_TUD_CDC               0
diff --git a/examples/device/msc_dual_lun/src/tusb_config.h b/examples/device/msc_dual_lun/src/tusb_config.h
index 2e40b9e8..073e2379 100644
--- a/examples/device/msc_dual_lun/src/tusb_config.h
+++ b/examples/device/msc_dual_lun/src/tusb_config.h
@@ -69,7 +69,9 @@
 // DEVICE CONFIGURATION
 //--------------------------------------------------------------------
 
-#define CFG_TUD_ENDOINT0_SIZE   64
+#ifndef CFG_TUD_ENDOINT0_SIZE
+#define CFG_TUD_ENDOINT0_SIZE    64
+#endif
 
 //------------- CLASS -------------//
 #define CFG_TUD_CDC             0
diff --git a/examples/device/webusb_serial/src/tusb_config.h b/examples/device/webusb_serial/src/tusb_config.h
index ffedb997..b2f09cac 100644
--- a/examples/device/webusb_serial/src/tusb_config.h
+++ b/examples/device/webusb_serial/src/tusb_config.h
@@ -69,7 +69,9 @@
 // DEVICE CONFIGURATION
 //--------------------------------------------------------------------
 
-#define CFG_TUD_ENDOINT0_SIZE     64
+#ifndef CFG_TUD_ENDOINT0_SIZE
+#define CFG_TUD_ENDOINT0_SIZE    64
+#endif
 
 //------------- CLASS -------------//
 #define CFG_TUD_CDC               1