diff --git a/spring-data-cassandra/src/main/java/org/springframework/data/cassandra/repository/support/SimpleCassandraRepository.java b/spring-data-cassandra/src/main/java/org/springframework/data/cassandra/repository/support/SimpleCassandraRepository.java
index 32cbb3d49..db14f46a3 100644
--- a/spring-data-cassandra/src/main/java/org/springframework/data/cassandra/repository/support/SimpleCassandraRepository.java
+++ b/spring-data-cassandra/src/main/java/org/springframework/data/cassandra/repository/support/SimpleCassandraRepository.java
@@ -71,7 +71,7 @@ public class SimpleCassandraRepository<T, ID extends Serializable> implements Ty
 	@Override
 	public <S extends T> List<S> save(Iterable<S> entities) {
 
-		Assert.notNull(entities, "The given Iterable of entities not be null!");
+		Assert.notNull(entities, "The given Iterable of entities must not be null");
 
 		List<S> result = new ArrayList<>();
 
@@ -138,7 +138,7 @@ public class SimpleCassandraRepository<T, ID extends Serializable> implements Ty
 	@Override
 	public void delete(Iterable<? extends T> entities) {
 
-		Assert.notNull(entities, "The given Iterable of entities not be null!");
+		Assert.notNull(entities, "The given Iterable of entities must not be null");
 
 		for (T entity : entities) {
 			operations.delete(entity);