diff --git a/spring-integration-file/src/main/java/org/springframework/integration/file/remote/synchronizer/AbstractInboundFileSynchronizer.java b/spring-integration-file/src/main/java/org/springframework/integration/file/remote/synchronizer/AbstractInboundFileSynchronizer.java
index 4fdfedda32..7628b322e4 100644
--- a/spring-integration-file/src/main/java/org/springframework/integration/file/remote/synchronizer/AbstractInboundFileSynchronizer.java
+++ b/spring-integration-file/src/main/java/org/springframework/integration/file/remote/synchronizer/AbstractInboundFileSynchronizer.java
@@ -50,6 +50,12 @@ import org.springframework.util.ObjectUtils;
  */
 public abstract class AbstractInboundFileSynchronizer<F> implements InboundFileSynchronizer, InitializingBean {
 
+	/**
+	 * Extension used when downloading files. We change it right after we know it's downloaded.
+	 */
+	static final String INCOMPLETE_EXTENSION = ".INCOMPLETE";
+
+
 	protected final Log logger = LogFactory.getLog(this.getClass());
 
 	/**
@@ -149,7 +155,7 @@ public abstract class AbstractInboundFileSynchronizer<F> implements InboundFileS
 		}
 		File localFile = new File(localDirectory, remoteFileName);
 		if (!localFile.exists()) {
-			String tempFileName = localFile.getAbsolutePath() + AbstractInboundFileSynchronizingMessageSource.INCOMPLETE_EXTENSION;
+			String tempFileName = localFile.getAbsolutePath() + INCOMPLETE_EXTENSION;
 			File tempFile = new File(tempFileName);
 			InputStream inputStream = null;
 			FileOutputStream fileOutputStream = new FileOutputStream(tempFile);
diff --git a/spring-integration-file/src/main/java/org/springframework/integration/file/remote/synchronizer/AbstractInboundFileSynchronizingMessageSource.java b/spring-integration-file/src/main/java/org/springframework/integration/file/remote/synchronizer/AbstractInboundFileSynchronizingMessageSource.java
index b31dd25d91..47b7591b7e 100644
--- a/spring-integration-file/src/main/java/org/springframework/integration/file/remote/synchronizer/AbstractInboundFileSynchronizingMessageSource.java
+++ b/spring-integration-file/src/main/java/org/springframework/integration/file/remote/synchronizer/AbstractInboundFileSynchronizingMessageSource.java
@@ -54,12 +54,6 @@ import org.springframework.util.Assert;
  */
 public abstract class AbstractInboundFileSynchronizingMessageSource<F> extends MessageProducerSupport implements MessageSource<File> {
 
-	/**
-	 * Extension used when downloading files. We change it right after we know it's downloaded.
-	 */
-	public static final String INCOMPLETE_EXTENSION = ".INCOMPLETE";
-
-
 	/**
 	 * Should the endpoint attempt to create the local directory and/or the remote directory?
 	 */
@@ -157,7 +151,7 @@ public abstract class AbstractInboundFileSynchronizingMessageSource<F> extends M
 
 	@SuppressWarnings("unchecked")
 	private FileListFilter<File> buildFilter() {
-		Pattern completePattern = Pattern.compile("^.*(?<!" + INCOMPLETE_EXTENSION + ")$");
+		Pattern completePattern = Pattern.compile("^.*(?<!" + AbstractInboundFileSynchronizer.INCOMPLETE_EXTENSION + ")$");
 		return new CompositeFileListFilter<File>(Arrays.asList(
 				new AcceptOnceFileListFilter<File>(),
 				new PatternMatchingFileListFilter(completePattern)));