diff --git a/src/leveled_bookie.erl b/src/leveled_bookie.erl
index cf2de34..733b1e6 100644
--- a/src/leveled_bookie.erl
+++ b/src/leveled_bookie.erl
@@ -960,6 +960,7 @@ book_headfold(Pid, Tag, all, FoldAccT, JournalCheck, SnapPreFold,
         {foldheads_allkeys, Tag, FoldAccT,
                     JournalCheck, SnapPreFold, 
                     SegmentList, LastModRange, MaxObjectCount},
+    io:format("RunnerType ~w~n", [RunnerType]),
     book_returnfolder(Pid, RunnerType).
 
 -spec book_snapshot(pid(),