#define P(a) pgm_read_byte(cscipher_sbox+(a))
#endif
-static uint8_t round_const[] PROGMEM = {
+static const uint8_t round_const[] PROGMEM = {
0xb7, 0xe1, 0x51, 0x62, 0x8a, 0xed, 0x2a, 0x6a,
0xbf, 0x71, 0x58, 0x80, 0x9c, 0xf4, 0xf3, 0xc7 };
-static uint8_t ks_const[] PROGMEM = {
+static const uint8_t ks_const[] PROGMEM = {
0x29,0x0d,0x61,0x40,0x9c,0xeb,0x9e,0x8f,
0x1f,0x85,0x5f,0x58,0x5b,0x01,0x39,0x86,
0x97,0x2e,0xd7,0xd6,0x35,0xae,0x17,0x16,