full_name_inc = xmalloc(strlen(full_name) + 4);
                                for (i = start; i < count; i++) {
                                        sprintf(full_name_inc, "%s%d", full_name, i);
-                                       rdev = (major << 8) + minor + (i * increment - start);
+                                       rdev = makedev(major, minor + (i * increment - start));
                                        if (mknod(full_name_inc, mode, rdev) == -1) {
                                                bb_perror_msg("line %d: Couldnt create node %s", linenum, full_name_inc);
                                                ret = EXIT_FAILURE;
                                }
                                free(full_name_inc);
                        } else {
-                               rdev = (major << 8) + minor;
+                               rdev = makedev(major, minor);
                                if (mknod(full_name, mode, rdev) == -1) {
                                        bb_perror_msg("line %d: Couldnt create node %s", linenum, full_name);
                                        ret = EXIT_FAILURE;