diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/pack/PackWriterBitmapPreparer.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/pack/PackWriterBitmapPreparer.java
index 509ee6111..9ab62d3c2 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/pack/PackWriterBitmapPreparer.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/pack/PackWriterBitmapPreparer.java
@@ -63,6 +63,7 @@ import org.eclipse.jgit.internal.storage.file.BitmapIndexImpl;
 import org.eclipse.jgit.internal.storage.file.PackBitmapIndex;
 import org.eclipse.jgit.internal.storage.file.PackBitmapIndexBuilder;
 import org.eclipse.jgit.internal.storage.file.PackBitmapIndexRemapper;
+import org.eclipse.jgit.internal.storage.pack.PackWriterBitmapWalker.AddUnseenToBitmapFilter;
 import org.eclipse.jgit.lib.AnyObjectId;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.ObjectId;
@@ -262,7 +263,7 @@ class PackWriterBitmapPreparer {
 				BitmapBuilder fullBitmap = commitBitmapIndex.newBitmapBuilder();
 				rw.reset();
 				rw.markStart(c);
-				rw.setRevFilter(PackWriterBitmapWalker.newRevFilter(
+				rw.setRevFilter(new AddUnseenToBitmapFilter(
 						selectionHelper.reusedCommitsBitmap, fullBitmap));
 
 				while (rw.next() != null) {
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/pack/PackWriterBitmapWalker.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/pack/PackWriterBitmapWalker.java
index 262e5c4a1..ccee1893f 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/pack/PackWriterBitmapWalker.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/pack/PackWriterBitmapWalker.java
@@ -110,8 +110,12 @@ final class PackWriterBitmapWalker {
 		}
 
 		if (marked) {
-			RevFilter filter = newRevFilter(seen, bitmapResult);
-			walker.setRevFilter(filter);
+			if (seen == null) {
+				walker.setRevFilter(new AddToBitmapFilter(bitmapResult));
+			} else {
+				walker.setRevFilter(
+						new AddUnseenToBitmapFilter(seen, bitmapResult));
+			}
 
 			while (walker.next() != null) {
 				// Iterate through all of the commits. The BitmapRevFilter does
@@ -141,13 +145,6 @@ final class PackWriterBitmapWalker {
 		walker.reset();
 	}
 
-	static RevFilter newRevFilter(BitmapBuilder seen, BitmapBuilder bitmapResult) {
-		if (seen != null) {
-			return new AddUnseenToBitmapFilter(seen, bitmapResult);
-		}
-		return new AddToBitmapFilter(bitmapResult);
-	}
-
 	/**
 	 * A RevFilter that adds the visited commits to {@code bitmap} as a side
 	 * effect.
@@ -158,7 +155,7 @@ final class PackWriterBitmapWalker {
 	 * have to visit its ancestors.  This ensures the walk is very short if
 	 * there is good bitmap coverage.
 	 */
-	private static class AddToBitmapFilter extends RevFilter {
+	static class AddToBitmapFilter extends RevFilter {
 		private final BitmapBuilder bitmap;
 
 		AddToBitmapFilter(BitmapBuilder bitmap) {
@@ -209,7 +206,7 @@ final class PackWriterBitmapWalker {
 	 * encountered, that commit and its parents will be marked with the SEEN
 	 * flag to prevent the walk from visiting its ancestors.
 	 */
-	private static class AddUnseenToBitmapFilter extends RevFilter {
+	static class AddUnseenToBitmapFilter extends RevFilter {
 		private final BitmapBuilder seen;
 		private final BitmapBuilder bitmap;