diff --git a/spring-session-hazelcast/hazelcast4/src/main/java/org/springframework/session/hazelcast/Hazelcast4IndexedSessionRepository.java b/spring-session-hazelcast/hazelcast4/src/main/java/org/springframework/session/hazelcast/Hazelcast4IndexedSessionRepository.java
index 8ca681d6..0406c31b 100644
--- a/spring-session-hazelcast/hazelcast4/src/main/java/org/springframework/session/hazelcast/Hazelcast4IndexedSessionRepository.java
+++ b/spring-session-hazelcast/hazelcast4/src/main/java/org/springframework/session/hazelcast/Hazelcast4IndexedSessionRepository.java
@@ -441,6 +441,7 @@ public class Hazelcast4IndexedSessionRepository
 						.resolveIndexesFor(this);
 				String principal = (attributeValue != null) ? indexes.get(PRINCIPAL_NAME_INDEX_NAME) : null;
 				this.delegate.setAttribute(PRINCIPAL_NAME_INDEX_NAME, principal);
+				this.delta.put(PRINCIPAL_NAME_INDEX_NAME, principal);
 			}
 			flushImmediateIfNecessary();
 		}