diff --git a/clients/modernsystem/buttondata.h b/clients/modernsystem/buttondata.h
index 20d0774bcf..1af5fb8ddf 100644
--- a/clients/modernsystem/buttondata.h
+++ b/clients/modernsystem/buttondata.h
@@ -2,7 +2,7 @@
 
 #define lowcolor_mask_width 14
 #define lowcolor_mask_height 15
-static unsigned char lowcolor_mask_bits[] = {
+static const unsigned char lowcolor_mask_bits[] = {
  0xf0,0x03,0xf8,0x07,0xfc,0xcf,0xfe,0x1f,0xfe,0x1f,0xff,0xff,0xff,0xff,0xff,
  0x3f,0xff,0x3f,0xff,0xbf,0xfe,0xdf,0xfe,0x9f,0xfc,0x0f,0xf8,0x07,0xf0,0x03,
  0x00,0x40,0x80,0x00,0x00,0x00,0x29,0x00,0x00,0x00,0x7c,0xfe,0x87,0x40,0x00,
@@ -10,7 +10,7 @@ static unsigned char lowcolor_mask_bits[] = {
 
 #define lowcolor_6a696a_width 14
 #define lowcolor_6a696a_height 15
-static unsigned char lowcolor_6a696a_bits[] = {
+static const unsigned char lowcolor_6a696a_bits[] = {
  0xf0,0x03,0x18,0x06,0x04,0xcc,0x06,0x18,0x02,0x10,0x00,0xc0,0x00,0xc0,0x00,
  0x00,0x00,0x00,0x00,0xc0,0x00,0xc0,0x00,0x80,0x00,0x00,0x00,0x00,0x00,0x00,
  0x00,0x40,0x80,0x00,0x00,0x00,0x11,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x03,
@@ -18,7 +18,7 @@ static unsigned char lowcolor_6a696a_bits[] = {
 
 #define lowcolor_949194_width 14
 #define lowcolor_949194_height 15
-static unsigned char lowcolor_949194_bits[] = {
+static const unsigned char lowcolor_949194_bits[] = {
  0x00,0x40,0xe0,0x01,0x08,0x02,0x00,0x04,0x04,0x08,0x07,0x78,0x03,0xf0,0x01,
  0xe0,0x01,0x60,0x01,0x20,0x00,0xc0,0x02,0x90,0x04,0x08,0x08,0x04,0xf0,0x03,
  0x00,0x40,0x80,0x00,0x00,0x00,0x21,0x00,0x00,0x00,0xc8,0x51,0x0c,0x08,0x0e,
@@ -26,7 +26,7 @@ static unsigned char lowcolor_949194_bits[] = {
 
 #define lowcolor_b4b6b4_width 14
 #define lowcolor_b4b6b4_height 15
-static unsigned char lowcolor_b4b6b4_bits[] = {
+static const unsigned char lowcolor_b4b6b4_bits[] = {
  0x00,0x40,0x00,0x00,0x10,0x00,0x08,0x02,0x18,0x06,0xb8,0x47,0x0c,0xce,0x0e,
  0xd8,0x06,0x58,0x02,0x10,0x02,0xd0,0x00,0x80,0x00,0x00,0x10,0x02,0x00,0x00,
  0x00,0x40,0x80,0x00,0x00,0x00,0x11,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x01,
@@ -34,7 +34,7 @@ static unsigned char lowcolor_b4b6b4_bits[] = {
 
 #define lowcolor_e6e6e6_width 14
 #define lowcolor_e6e6e6_height 15
-static unsigned char lowcolor_e6e6e6_bits[] = {
+static const unsigned char lowcolor_e6e6e6_bits[] = {
  0x00,0x40,0x00,0x00,0x00,0x00,0xe0,0x01,0x00,0x00,0x00,0x40,0x00,0xc0,0x00,
  0xc0,0x00,0x40,0xe0,0xc0,0xe0,0xc1,0xe0,0x81,0xf0,0x03,0xc0,0x00,0x00,0x00,
  0x00,0x40,0x80,0x00,0x00,0x00,0x39,0x00,0x00,0x00,0x08,0x19,0x0d,0x08,0x00,