diff --git a/beacon_node/beacon_chain/src/beacon_chain.rs b/beacon_node/beacon_chain/src/beacon_chain.rs
index a99b5db6051..1539510721a 100644
--- a/beacon_node/beacon_chain/src/beacon_chain.rs
+++ b/beacon_node/beacon_chain/src/beacon_chain.rs
@@ -2485,6 +2485,14 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
             }
         }
 
+        if let Some(event_handler) = self.event_handler.as_ref() {
+            if event_handler.has_attester_slashing_subscribers() {
+                event_handler.register(EventKind::AttesterSlashing(Box::new(
+                    attester_slashing.clone().into_inner(),
+                )));
+            }
+        }
+
         // Add to the op pool (if we have the ability to propose blocks).
         if self.eth1_chain.is_some() {
             self.op_pool.insert_attester_slashing(attester_slashing)