diff --git a/Changelog.txt b/Changelog.txt
index 7c28b0d..83d055e 100644
--- a/Changelog.txt
+++ b/Changelog.txt
@@ -1,3 +1,6 @@
+--- v1.4.3 (August 23, 2041)
+- Fix compilation with modern GCC
+
 --- v1.4.2 (July 14, 2013)
 - Corrected the USB Vendor ID
 
diff --git a/main.c b/main.c
index f5089ae..0dfaffa 100644
--- a/main.c
+++ b/main.c
@@ -37,7 +37,7 @@ static uchar rt_usbDeviceDescriptorSize=0;
 /* The maximum number of independent reports that are supported. */
 #define MAX_REPORTS 8	
 
-PROGMEM int usbDescriptorStringSerialNumber[]  = {
+const PROGMEM int usbDescriptorStringSerialNumber[]  = {
 	USB_STRING_DESCRIPTOR_HEADER(4),
 	'1','0','0','0'
 };
diff --git a/usbdrv/usbdrv.c b/usbdrv/usbdrv.c
index ba859d6..43a2d02 100644
--- a/usbdrv/usbdrv.c
+++ b/usbdrv/usbdrv.c
@@ -5,7 +5,7 @@
  * Tabsize: 4
  * Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
  * License: GNU GPL v2 (see License.txt) or proprietary (CommercialLicense.txt)
- * This Revision: $Id: usbdrv.c,v 1.2 2009-05-02 12:41:41 cvs Exp $
+ * This Revision: $Id: usbdrv.c,v 1.3 2014-08-23 23:58:32 cvs Exp $
  */
 
 #include "iarcompat.h"
@@ -80,7 +80,7 @@ optimizing hints:
 #if USB_CFG_DESCR_PROPS_STRING_0 == 0
 #undef USB_CFG_DESCR_PROPS_STRING_0
 #define USB_CFG_DESCR_PROPS_STRING_0    sizeof(usbDescriptorString0)
-PROGMEM char usbDescriptorString0[] = { /* language descriptor */
+const PROGMEM char usbDescriptorString0[] = { /* language descriptor */
     4,          /* sizeof(usbDescriptorString0): length of descriptor in bytes */
     3,          /* descriptor type */
     0x09, 0x04, /* language index (0x0409 = US-English) */
@@ -90,7 +90,7 @@ PROGMEM char usbDescriptorString0[] = { /* language descriptor */
 #if USB_CFG_DESCR_PROPS_STRING_VENDOR == 0 && USB_CFG_VENDOR_NAME_LEN
 #undef USB_CFG_DESCR_PROPS_STRING_VENDOR
 #define USB_CFG_DESCR_PROPS_STRING_VENDOR   sizeof(usbDescriptorStringVendor)
-PROGMEM int  usbDescriptorStringVendor[] = {
+const PROGMEM int  usbDescriptorStringVendor[] = {
     USB_STRING_DESCRIPTOR_HEADER(USB_CFG_VENDOR_NAME_LEN),
     USB_CFG_VENDOR_NAME
 };
@@ -99,7 +99,7 @@ PROGMEM int  usbDescriptorStringVendor[] = {
 #if USB_CFG_DESCR_PROPS_STRING_PRODUCT == 0 && USB_CFG_DEVICE_NAME_LEN
 #undef USB_CFG_DESCR_PROPS_STRING_PRODUCT
 #define USB_CFG_DESCR_PROPS_STRING_PRODUCT   sizeof(usbDescriptorStringDevice)
-PROGMEM int  usbDescriptorStringDevice[] = {
+const PROGMEM int  usbDescriptorStringDevice[] = {
     USB_STRING_DESCRIPTOR_HEADER(USB_CFG_DEVICE_NAME_LEN),
     USB_CFG_DEVICE_NAME
 };
@@ -108,7 +108,7 @@ 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
 };
diff --git a/usbdrv/usbdrv.h b/usbdrv/usbdrv.h
index fc4141b..43ca4e5 100644
--- a/usbdrv/usbdrv.h
+++ b/usbdrv/usbdrv.h
@@ -5,7 +5,7 @@
  * Tabsize: 4
  * Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
  * License: GNU GPL v2 (see License.txt) or proprietary (CommercialLicense.txt)
- * This Revision: $Id: usbdrv.h,v 1.2 2009-05-02 12:41:41 cvs Exp $
+ * This Revision: $Id: usbdrv.h,v 1.3 2014-08-23 23:58:32 cvs Exp $
  */
 
 #ifndef __usbdrv_h_included__
@@ -394,43 +394,43 @@ extern volatile schar   usbRxLen;
 #ifndef __ASSEMBLER__
 extern
 #if !(USB_CFG_DESCR_PROPS_DEVICE & USB_PROP_IS_RAM)
-PROGMEM
+const PROGMEM
 #endif
 char usbDescriptorDevice[];
 
 extern
 #if !(USB_CFG_DESCR_PROPS_CONFIGURATION & USB_PROP_IS_RAM)
-PROGMEM
+const PROGMEM
 #endif
 char usbDescriptorConfiguration[];
 
 extern
 #if !(USB_CFG_DESCR_PROPS_HID_REPORT & USB_PROP_IS_RAM)
-PROGMEM
+const PROGMEM
 #endif
 char usbDescriptorHidReport[];
 
 extern
 #if !(USB_CFG_DESCR_PROPS_STRING_0 & USB_PROP_IS_RAM)
-PROGMEM
+const PROGMEM
 #endif
 char usbDescriptorString0[];
 
 extern
 #if !(USB_CFG_DESCR_PROPS_STRING_VENDOR & USB_PROP_IS_RAM)
-PROGMEM
+const PROGMEM
 #endif
 int usbDescriptorStringVendor[];
 
 extern
 #if !(USB_CFG_DESCR_PROPS_STRING_PRODUCT & USB_PROP_IS_RAM)
-PROGMEM
+const PROGMEM
 #endif
 int usbDescriptorStringDevice[];
 
 extern
 #if !(USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER & USB_PROP_IS_RAM)
-PROGMEM
+const PROGMEM
 #endif
 int usbDescriptorStringSerialNumber[];
 
diff --git a/usbdrv/usbdrvasm.S b/usbdrv/usbdrvasm.S
index 84d13a4..6788b64 100644
--- a/usbdrv/usbdrvasm.S
+++ b/usbdrv/usbdrvasm.S
@@ -5,7 +5,7 @@
  * Tabsize: 4
  * Copyright: (c) 2007 by OBJECTIVE DEVELOPMENT Software GmbH
  * License: GNU GPL v2 (see License.txt) or proprietary (CommercialLicense.txt)
- * Revision: $Id: usbdrvasm.S,v 1.2 2009-05-02 12:41:41 cvs Exp $
+ * Revision: $Id: usbdrvasm.S,v 1.3 2014-08-23 23:58:32 cvs Exp $
  */
 
 /*
@@ -74,7 +74,7 @@ the file appropriate for the given clock rate.
 #   define nop2     rjmp    .+0 /* jump to next instruction */
 
 #   ifndef USB_INTR_VECTOR /* default to hardware interrupt INT0 */
-#       define USB_INTR_VECTOR  SIG_INTERRUPT0
+#       define USB_INTR_VECTOR  INT0_vect
 #   endif
     .text
     .global USB_INTR_VECTOR