diff --git a/pulsar-proxy/src/main/java/org/apache/pulsar/proxy/server/ProxyConnection.java b/pulsar-proxy/src/main/java/org/apache/pulsar/proxy/server/ProxyConnection.java
index d9960c5a1ec31..9b8b7fb0aed14 100644
--- a/pulsar-proxy/src/main/java/org/apache/pulsar/proxy/server/ProxyConnection.java
+++ b/pulsar-proxy/src/main/java/org/apache/pulsar/proxy/server/ProxyConnection.java
@@ -327,6 +327,7 @@ protected void handleConnect(CommandConnect connect) {
             }
 
             authState = authenticationProvider.newAuthState(clientData, remoteAddress, sslSession);
+            authenticationData = authState.getAuthDataSource();
             doAuthentication(clientData);
         } catch (Exception e) {
             LOG.warn("[{}] Unable to authenticate: ", remoteAddress, e);