diff -r 24ca1bf4a0bf -r 7f9cdb9d166d goduf.go
--- a/goduf.go	Sun Oct 14 15:33:53 2018 +0200
+++ b/goduf.go	Sun Oct 14 15:44:28 2018 +0200
@@ -529,6 +529,7 @@
 		}
 		results.Groups = append(results.Groups, newSet)
 	}
+	results.NumberOfSets = uint(len(results.Groups))
 	results.RedundantDataSizeH = formatSize(results.RedundantDataSize, true)
 	results.TotalFileCount = data.cmpt