diff --git a/src/bin/hexyl.rs b/src/bin/hexyl.rs
index c9ec0c8..2f11cff 100644
--- a/src/bin/hexyl.rs
+++ b/src/bin/hexyl.rs
@@ -51,7 +51,7 @@ fn run() -> Result<(), Box<dyn std::error::Error>> {
                 .value_name("SIZE")
                 .help(
                     "Sets the size of the `block` unit to SIZE. Examples: \
-                    --block-size=1024, --block-size=4kB",
+                     --block-size=1024, --block-size=4kB",
                 ),
         )
         .arg(