diff --git a/src/edu/nps/moves/lifi/LiFiBenchmark.java b/src/edu/nps/moves/lifi/LiFiBenchmark.java
index 05d4797db93f97905e5ef8ed6b7b869f55fbf744..cad77340757e7a919f717bb0acee68f79e6fcae4 100644
--- a/src/edu/nps/moves/lifi/LiFiBenchmark.java
+++ b/src/edu/nps/moves/lifi/LiFiBenchmark.java
@@ -79,7 +79,7 @@ public class LiFiBenchmark
     if (cline.hasOption("targetport"))
       targetPort = Integer.parseInt(cline.getOptionValue("targetport", "" + DEFAULT_PORT));
     if (cline.hasOption("sz"))
-      readLimit = handleSize(cline.getOptionValue("sz"));
+      readLimit = handleSize(cline.getOptionValue("sz",""+DEFAULT_READ_LIMIT));
     if (cline.hasOption("r"))
       reps = Integer.parseInt(cline.getOptionValue("r",""+DEFAULT_REPITITIONS));
     if (cline.hasOption("x"))