diff --git a/node-api/src/main/kotlin/net/corda/nodeapi/internal/protonwrapper/netty/ConnectionChange.kt b/node-api/src/main/kotlin/net/corda/nodeapi/internal/protonwrapper/netty/ConnectionChange.kt
index 954e2c1f76..da839954ce 100644
--- a/node-api/src/main/kotlin/net/corda/nodeapi/internal/protonwrapper/netty/ConnectionChange.kt
+++ b/node-api/src/main/kotlin/net/corda/nodeapi/internal/protonwrapper/netty/ConnectionChange.kt
@@ -3,4 +3,8 @@ package net.corda.nodeapi.internal.protonwrapper.netty
 import java.net.InetSocketAddress
 import java.security.cert.X509Certificate
 
-data class ConnectionChange(val remoteAddress: InetSocketAddress, val remoteCert: X509Certificate?, val connected: Boolean, val badCert: Boolean)
\ No newline at end of file
+data class ConnectionChange(val remoteAddress: InetSocketAddress, val remoteCert: X509Certificate?, val connected: Boolean, val badCert: Boolean) {
+    override fun toString(): String {
+        return "ConnectionChange remoteAddress: $remoteAddress connected state: $connected cert subject: ${remoteCert?.subjectDN} cert ok: ${!badCert}"
+    }
+}
\ No newline at end of file