diff --git a/radicle-cli/src/commands/diff.rs b/radicle-cli/src/commands/diff.rs
index 1eef5cb4..78f2ee58 100644
--- a/radicle-cli/src/commands/diff.rs
+++ b/radicle-cli/src/commands/diff.rs
@@ -27,6 +27,7 @@ Usage
 
 Options
 
+    --unified, -U   Context lines to show (default: 5)
     --staged        View staged changes
     --color         Force color output
     --help          Print help