diff --git a/src/uu/cksum/cksum.md b/src/uu/cksum/cksum.md
index c54132ef5..4b0d25f32 100644
--- a/src/uu/cksum/cksum.md
+++ b/src/uu/cksum/cksum.md
@@ -10,14 +10,14 @@ Print CRC and size for each file
 
 DIGEST determines the digest algorithm and default output format:
 
-- `-a=sysv`:    (equivalent to sum -s)
-- `-a=bsd`:     (equivalent to sum -r)
-- `-a=crc`:     (equivalent to cksum)
-- `-a=md5`:     (equivalent to md5sum)
-- `-a=sha1`:    (equivalent to sha1sum)
-- `-a=sha224`:  (equivalent to sha224sum)
-- `-a=sha256`:  (equivalent to sha256sum)
-- `-a=sha384`:  (equivalent to sha384sum)
-- `-a=sha512`:  (equivalent to sha512sum)
-- `-a=blake2b`: (equivalent to b2sum)
-- `-a=sm3`:     (only available through cksum)
+- `sysv`:    (equivalent to sum -s)
+- `bsd`:     (equivalent to sum -r)
+- `crc`:     (equivalent to cksum)
+- `md5`:     (equivalent to md5sum)
+- `sha1`:    (equivalent to sha1sum)
+- `sha224`:  (equivalent to sha224sum)
+- `sha256`:  (equivalent to sha256sum)
+- `sha384`:  (equivalent to sha384sum)
+- `sha512`:  (equivalent to sha512sum)
+- `blake2b`: (equivalent to b2sum)
+- `sm3`:     (only available through cksum)