diff --git a/beacon_node/beacon_chain/src/validator_pubkey_cache.rs b/beacon_node/beacon_chain/src/validator_pubkey_cache.rs
index 0866b0d0cf..1dc1a099f5 100644
--- a/beacon_node/beacon_chain/src/validator_pubkey_cache.rs
+++ b/beacon_node/beacon_chain/src/validator_pubkey_cache.rs
@@ -1,6 +1,7 @@
 use crate::errors::BeaconChainError;
 use crate::{BeaconChainTypes, BeaconStore};
 use bls::PUBLIC_KEY_UNCOMPRESSED_BYTES_LEN;
+use slog::debug;
 use smallvec::SmallVec;
 use ssz::{Decode, Encode};
 use ssz_derive::{Decode, Encode};