1 files changed, 1 insertions, 1 deletions

diff --git a/tmk_core/protocol/vusb/usbdrv/usbdrv.c b/tmk_core/protocol/vusb/usbdrv/usbdrv.c
index 2e8dd8756..30cdc9dcf 100644
--- a/tmk_core/protocol/vusb/usbdrv/usbdrv.c
+++ b/tmk_core/protocol/vusb/usbdrv/usbdrv.c
@@ -95,7 +95,7 @@ const PROGMEM int  usbDescriptorStringDevice[] = {
 #if USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER == 0 && USB_CFG_SERIAL_NUMBER_LEN
 #undef USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER
 #define USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER    sizeof(usbDescriptorStringSerialNumber)
-PROGMEM int usbDescriptorStringSerialNumber[] = {
+const PROGMEM int usbDescriptorStringSerialNumber[] = {
     USB_STRING_DESCRIPTOR_HEADER(USB_CFG_SERIAL_NUMBER_LEN),
     USB_CFG_SERIAL_NUMBER
 };