diff --git a/src/response.rs b/src/response.rs
index 25da3d3..92d6203 100644
--- a/src/response.rs
+++ b/src/response.rs
@@ -42,7 +42,7 @@ pub(crate) fn response_body(
     let modified = meta
         .modified()
         .ok()
-        .filter(|&t| t != std::time::UNIX_EPOCH)
+        .filter(|&t| t > (std::time::UNIX_EPOCH + std::time::Duration::from_secs(1)))
         .map(LastModified::from);
 
     match conditionals.check(modified) {