diff --git a/node/src/main/kotlin/net/corda/node/services/network/PersistentNetworkMapCache.kt b/node/src/main/kotlin/net/corda/node/services/network/PersistentNetworkMapCache.kt
index 6f17e86b39..b3bd8df222 100644
--- a/node/src/main/kotlin/net/corda/node/services/network/PersistentNetworkMapCache.kt
+++ b/node/src/main/kotlin/net/corda/node/services/network/PersistentNetworkMapCache.kt
@@ -22,6 +22,7 @@ import net.corda.core.serialization.deserialize
 import net.corda.core.serialization.serialize
 import net.corda.core.utilities.NetworkHostAndPort
 import net.corda.core.utilities.loggerFor
+import net.corda.core.utilities.toBase58String
 import net.corda.node.services.api.NetworkCacheException
 import net.corda.node.services.api.NetworkMapCacheInternal
 import net.corda.node.services.api.ServiceHubInternal