diff --git a/crates/ruff_cli/src/args.rs b/crates/ruff_cli/src/args.rs
index 1c693ca368ad2..0ddd2f7867545 100644
--- a/crates/ruff_cli/src/args.rs
+++ b/crates/ruff_cli/src/args.rs
@@ -410,7 +410,7 @@ pub struct FormatCommand {
     #[clap(long, overrides_with("force_exclude"), hide = true)]
     no_force_exclude: bool,
     /// Set the line-length.
-    #[arg(long, help_heading = "Rule configuration", hide = true)]
+    #[arg(long, help_heading = "Format configuration")]
     pub line_length: Option<LineLength>,
     /// Ignore all configuration files.
     #[arg(long, conflicts_with = "config", help_heading = "Miscellaneous")]
diff --git a/docs/configuration.md b/docs/configuration.md
index de8f4432aec9a..6fe954c38f1cf 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -402,6 +402,9 @@ File selection:
       --exclude <FILE_PATTERN>  List of paths, used to omit files and/or directories from analysis
       --force-exclude           Enforce exclusions, even for paths passed to Ruff directly on the command-line. Use `--no-force-exclude` to disable
 
+Format configuration:
+      --line-length <LINE_LENGTH>  Set the line-length
+
 Log levels:
   -v, --verbose  Enable verbose logging
   -q, --quiet    Print diagnostics, but nothing else