diff --git a/src/hot.rs b/src/hot.rs
index a745e3e..2940889 100644
--- a/src/hot.rs
+++ b/src/hot.rs
@@ -325,16 +325,18 @@ pub fn watch(path: impl AsRef<Path>) -> Oneesan
 	}),
 	handle,
     };
-    
 
     output
 }
 
+/// Some predefined filter functions
 pub mod filter
 {
     use super::*;
-
+    
     #[inline(always)]
     const fn all(_: &Event) -> bool {true}
+
+    /// Empty filter, accept all
     pub const ALL: Option<fn (&Event) -> bool> = None;
 }