diff --git a/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/ColumnMapItemPreparedStatementSetter.java b/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/ColumnMapItemPreparedStatementSetter.java
index fc7f740e3..22bfb81a3 100644
--- a/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/ColumnMapItemPreparedStatementSetter.java
+++ b/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/ColumnMapItemPreparedStatementSetter.java
@@ -29,6 +29,7 @@ import org.springframework.util.Assert;
  */
 public class ColumnMapItemPreparedStatementSetter implements ItemPreparedStatementSetter {
 
+	@SuppressWarnings("unchecked")
 	public void setValues(Object item, PreparedStatement ps) throws SQLException {
 		Assert.isInstanceOf(Map.class, item, "Input to map PreparedStatement parameters must be of type Map.");
 		Set keySet = ((Map)item).entrySet();
diff --git a/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/IbatisKeyCollector.java b/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/IbatisKeyCollector.java
index 7597efc55..e716f3f68 100644
--- a/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/IbatisKeyCollector.java
+++ b/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/IbatisKeyCollector.java
@@ -45,7 +45,8 @@ public class IbatisKeyCollector extends ExecutionContextUserSupport implements K
 	 * 
 	 * @see KeyCollector#retrieveKeys()
 	 */
-	public List retrieveKeys(ExecutionContext executionContext) {
+	@SuppressWarnings("unchecked")
+	public List<Object> retrieveKeys(ExecutionContext executionContext) {
 		if (executionContext.containsKey(getKey(RESTART_KEY))) {
 			Object key = executionContext.get(getKey(RESTART_KEY));
 			return sqlMapClientTemplate.queryForList(restartQueryId, key);
diff --git a/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/MultipleColumnJdbcKeyCollector.java b/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/MultipleColumnJdbcKeyCollector.java
index 81c536833..37333c3e6 100644
--- a/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/MultipleColumnJdbcKeyCollector.java
+++ b/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/MultipleColumnJdbcKeyCollector.java
@@ -88,7 +88,8 @@ public class MultipleColumnJdbcKeyCollector extends ExecutionContextUserSupport
 	 * org.springframework.batch.io.sql.scratch.AbstractDrivingQueryItemReader
 	 * #retrieveKeys()
 	 */
-	public List retrieveKeys(ExecutionContext executionContext) {
+	@SuppressWarnings("unchecked")
+	public List<Object> retrieveKeys(ExecutionContext executionContext) {
 
 		Assert.state(keyMapper != null, "KeyMapper must not be null.");
 		Assert.state(StringUtils.hasText(restartSql), "The RestartQuery must not be null or empty"
diff --git a/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/SingleColumnJdbcKeyCollector.java b/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/SingleColumnJdbcKeyCollector.java
index 58f390d56..2971b0533 100644
--- a/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/SingleColumnJdbcKeyCollector.java
+++ b/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/SingleColumnJdbcKeyCollector.java
@@ -85,7 +85,8 @@ public class SingleColumnJdbcKeyCollector extends ExecutionContextUserSupport im
 	 * 
 	 * @see org.springframework.batch.io.driving.KeyGenerationStrategy#retrieveKeys()
 	 */
-	public List retrieveKeys(ExecutionContext executionContext) {
+	@SuppressWarnings("unchecked")
+	public List<Object> retrieveKeys(ExecutionContext executionContext) {
 
 		Assert.notNull(executionContext, "The ExecutionContext must not be null");