diff --git a/spring-session-hazelcast/src/integration-test/java/org/springframework/session/hazelcast/AbstractHazelcastRepositoryITests.java b/spring-session-hazelcast/src/integration-test/java/org/springframework/session/hazelcast/AbstractHazelcastRepositoryITests.java
index 1a8419be..9c4c03b7 100644
--- a/spring-session-hazelcast/src/integration-test/java/org/springframework/session/hazelcast/AbstractHazelcastRepositoryITests.java
+++ b/spring-session-hazelcast/src/integration-test/java/org/springframework/session/hazelcast/AbstractHazelcastRepositoryITests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2017 the original author or authors.
+ * Copyright 2014-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -153,4 +153,18 @@ public abstract class AbstractHazelcastRepositoryITests {
 
 		this.repository.deleteById(toSave.getId());
 	}
+
+	@Test // gh-1076
+	public void attemptToUpdateSessionAfterDelete() {
+		HazelcastSession session = this.repository.createSession();
+		String sessionId = session.getId();
+		this.repository.save(session);
+		session = this.repository.findById(sessionId);
+		session.setAttribute("attributeName", "attributeValue");
+		this.repository.deleteById(sessionId);
+		this.repository.save(session);
+
+		assertThat(this.repository.findById(sessionId)).isNull();
+	}
+
 }
diff --git a/spring-session-hazelcast/src/main/java/org/springframework/session/hazelcast/HazelcastSessionRepository.java b/spring-session-hazelcast/src/main/java/org/springframework/session/hazelcast/HazelcastSessionRepository.java
index 195372c1..ac98fb84 100644
--- a/spring-session-hazelcast/src/main/java/org/springframework/session/hazelcast/HazelcastSessionRepository.java
+++ b/spring-session-hazelcast/src/main/java/org/springframework/session/hazelcast/HazelcastSessionRepository.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2017 the original author or authors.
+ * Copyright 2014-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -452,6 +452,9 @@ public class HazelcastSessionRepository implements
 		@Override
 		public Object process(Map.Entry<String, MapSession> entry) {
 			MapSession value = entry.getValue();
+			if (value == null) {
+				return Boolean.FALSE;
+			}
 			value.setLastAccessedTime(this.lastAccessedTime);
 			value.setMaxInactiveInterval(this.maxInactiveInterval);
 			for (final Map.Entry<String, Object> attribute : this.delta.entrySet()) {
@@ -463,7 +466,7 @@ public class HazelcastSessionRepository implements
 				}
 			}
 			entry.setValue(value);
-			return value;
+			return Boolean.TRUE;
 		}
 
 	}