diff --git a/util-linux/freeramdisk.c b/util-linux/freeramdisk.c
index 6b9d95e..4949056 100644
--- a/util-linux/freeramdisk.c
+++ b/util-linux/freeramdisk.c
@@ -15,16 +15,14 @@
 #define FDFLUSH  _IO(2,0x4b)
 
 int freeramdisk_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int freeramdisk_main(int argc, char **argv)
+int freeramdisk_main(int argc UNUSED_PARAM, char **argv)
 {
 	int fd;
 
-	if (argc != 2) bb_show_usage();
-
-	fd = xopen(argv[1], O_RDWR);
+	fd = xopen(single_argv(argv), O_RDWR);
 
 	// Act like freeramdisk, fdflush, or both depending on configuration.
-	ioctl_or_perror_and_die(fd, (ENABLE_FREERAMDISK && applet_name[1]=='r')
+	ioctl_or_perror_and_die(fd, (ENABLE_FREERAMDISK && applet_name[1] == 'r')
 			|| !ENABLE_FDFLUSH ? BLKFLSBUF : FDFLUSH, NULL, "%s", argv[1]);
 
 	if (ENABLE_FEATURE_CLEAN_UP) close(fd);