diff --git a/src/bin/hexyl.rs b/src/bin/hexyl.rs
index 4b4cf5b..a27e6e8 100644
--- a/src/bin/hexyl.rs
+++ b/src/bin/hexyl.rs
@@ -177,6 +177,17 @@ fn run() -> Result<(), AnyhowError> {
                     The possible options are 1, 2, 4, 8. The default is 1",
                 ),
         )
+        .arg(
+            Arg::new("base")
+                .short('b')
+                .long("base")
+                .num_args(1)
+                .value_name("B")
+                .help(
+                    "Sets the base used for the bytes. The possible options are \
+                    binary, octal, decimal, and hexadecimal."
+                )
+        )
         .arg(
             Arg::new("terminal_width")
                 .long("terminal-width")