diff --git a/common-tools/clas-io/src/main/java/org/jlab/utils/JsonUtils.java b/common-tools/clas-io/src/main/java/org/jlab/utils/JsonUtils.java
index 13c311a12..b2a6903ae 100644
--- a/common-tools/clas-io/src/main/java/org/jlab/utils/JsonUtils.java
+++ b/common-tools/clas-io/src/main/java/org/jlab/utils/JsonUtils.java
@@ -261,7 +261,7 @@ public static DataBank extend(DataEvent event, String bankName, String varName,
     }
 
     public static void main(String args[]) {
-        OptionParser parser = new OptionParser();
+        OptionParser parser = new OptionParser("hipo-json");
         parser.addRequired("-b","bank name");
         parser.addOption("-v", "json", "variable name");
         parser.addOption("-i", "1", "ignore parsing errors");