diff --git a/neqo-transport/src/send_stream.rs b/neqo-transport/src/send_stream.rs
index de7ba78ec4..3f0002da13 100644
--- a/neqo-transport/src/send_stream.rs
+++ b/neqo-transport/src/send_stream.rs
@@ -1659,12 +1659,6 @@ impl SendStreams {
         }
     }
 
-    pub fn mark_all_as_lost(&mut self) {
-        for stream in self.map.values_mut() {
-            stream.mark_as_lost(0, usize::MAX, true);
-        }
-    }
-
     pub fn clear(&mut self) {
         self.map.clear();
         self.sendordered.clear();