diff --git a/b3sum/src/main.rs b/b3sum/src/main.rs
index 0b692a2..23dc098 100644
--- a/b3sum/src/main.rs
+++ b/b3sum/src/main.rs
@@ -22,4 +22,5 @@ const NUM_THREADS_ARG: &str = "num-threads";
 const RAW_ARG: &str = "raw";
 const CHECK_ARG: &str = "check";
+const TAG_ARG: &str = "tag";
 const QUIET_ARG: &str = "quiet";
 
@@ -115,4 +116,9 @@ impl Args {
                     ),
             )
+            .arg(
+                Arg::new(TAG_ARG)
+                    .long(TAG_ARG)
+                    .help("Create a BSD-style checksum."),
+            )
             // wild::args_os() is equivalent to std::env::args_os() on Unix,
             // but on Windows it adds support for globbing.
@@ -158,4 +164,8 @@ impl Args {
     }
 
+    fn tag(&self) -> bool {
+        self.inner.is_present(TAG_ARG)
+    }
+
     fn raw(&self) -> bool {
         self.inner.is_present(RAW_ARG)
@@ -315,4 +325,7 @@ fn write_hex_output(mut output: blake3::OutputReader, args: &Args) -> Result<()>
         let take_bytes = cmp::min(len, block.len() as u64);
         print!("{}", &hex_str[..2 * take_bytes as usize]);
+        if args.tag() {
+            print!("\n");
+        }
         len -= take_bytes;
     }
@@ -515,6 +528,11 @@ fn hash_one_input(path: &Path, args: &Args) -> Result<()> {
         print!("\\");
     }
-    write_hex_output(output, args)?;
-    println!("  {}", filepath_string);
+    if args.tag() {
+        print!("BLAKE3 ({}) = ", filepath_string);
+        write_hex_output(output, args)?;
+    } else {
+        write_hex_output(output, args)?;
+        println!("  {}", filepath_string);
+    }
     Ok(())
 }