diff --git a/src/rust/lqos_sys/src/bpf_iterator.rs b/src/rust/lqos_sys/src/bpf_iterator.rs
index 25c8b044..f3c77c0e 100644
--- a/src/rust/lqos_sys/src/bpf_iterator.rs
+++ b/src/rust/lqos_sys/src/bpf_iterator.rs
@@ -237,6 +237,7 @@ pub unsafe fn iterate_rtt(
   }
 }
 
+/// Iterate through the heimdall map and call the callback for each entry.
 pub fn iterate_heimdall(
   callback: &mut dyn FnMut(&HeimdallKey, &[HeimdallData]),
 ) {