diff --git a/actix-files/src/path_buf.rs b/actix-files/src/path_buf.rs
index 82b13e30..50b9677e 100644
--- a/actix-files/src/path_buf.rs
+++ b/actix-files/src/path_buf.rs
@@ -40,6 +40,7 @@ impl PathBufWrap {
             return Err(UriSegmentError::BadChar('/'));
         }
 
+        // disallow invalid or suspicious path segments
         for segment in path.split('/') {
             if segment == ".." {
                 segment_count -= 1;