diff --git a/README.md b/README.md
index eb32da8..6798f9a 100644
--- a/README.md
+++ b/README.md
@@ -294,7 +294,6 @@ FLAGS:
     -F, --fixed-strings      Treat the pattern as a literal string
     -a, --absolute-path      Show absolute instead of relative paths
     -L, --follow             Follow symbolic links
-        --one-file-system    Don't cross file system boundaries (only Unix/Windows)
     -p, --full-path          Search full path (default: file-/dirname only)
     -0, --print0             Separate results by the null character
     -h, --help               Prints help information
diff --git a/src/app.rs b/src/app.rs
index 7b2df57..8be6f94 100644
--- a/src/app.rs
+++ b/src/app.rs
@@ -291,7 +291,8 @@ pub fn build_app() -> App<'static, 'static> {
         app = app.arg(
             arg("one-file-system")
                 .long("one-file-system")
-                .aliases(&["mount", "xdev"]),
+                .aliases(&["mount", "xdev"])
+                .hidden_short_help(true),
         );
     }