diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/storage/pack/PackWriter.java b/org.eclipse.jgit/src/org/eclipse/jgit/storage/pack/PackWriter.java
index f74f2628e..285cd7e21 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/storage/pack/PackWriter.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/storage/pack/PackWriter.java
@@ -587,8 +587,10 @@ public class PackWriter {
 			stats.thinPackBytes = out.length() - (headerEnd - headerStart);
 
 		for (CachedPack pack : cachedPacks) {
+			long deltaCnt = pack.getDeltaCount();
 			stats.reusedObjects += pack.getObjectCount();
-			stats.reusedDeltas += pack.getDeltaCount();
+			stats.reusedDeltas += deltaCnt;
+			stats.totalDeltas += deltaCnt;
 			reuseSupport.copyPackAsIs(out, pack);
 		}
 		writeChecksum(out);