diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileRepository.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileRepository.java
index 9cdea597f..53a1cd639 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileRepository.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileRepository.java
@@ -594,6 +594,7 @@ private boolean shouldAutoDetach() {
 	}
 
 	/** {@inheritDoc} */
+	@SuppressWarnings("FutureReturnValueIgnored")
 	@Override
 	public void autoGC(ProgressMonitor monitor) {
 		GC gc = new GC(this);