-static const unsigned long head = 0xaabbccdd;
-static const unsigned long tail = 0x11223344;
-static const unsigned long freed = 0xffeeffee;
+static const unsigned char head[] = {44, 33, 22, 11};
+static const unsigned char tail[] = {11, 22, 33, 44};
+static const unsigned char freed[] = {99, 99, 99, 99};