diff --git a/auditlog/src/main/scala/com/gerritforge/analytics/auditlog/model/CommandLineArguments.scala b/auditlog/src/main/scala/com/gerritforge/analytics/auditlog/model/CommandLineArguments.scala
index 564b873..dca84ed 100644
--- a/auditlog/src/main/scala/com/gerritforge/analytics/auditlog/model/CommandLineArguments.scala
+++ b/auditlog/src/main/scala/com/gerritforge/analytics/auditlog/model/CommandLineArguments.scala
@@ -50,7 +50,7 @@
           c.copy(additionalUserInfoPath = Some(input))
         } text "path to a CSV file containing additional user information (Optional)\n\t\t\t\tCSV must have an header. Example:\n\t\t\t\tid,type\n\t\t\t\t123456,'bot'\n\t\t\t\t678876,'human'"
 
-        opt[String]('a', "eventsTimeAggregation") optional () action { (input, c) =>
+        opt[String]('e', "eventsTimeAggregation") optional () action { (input, c) =>
           c.copy(eventsTimeAggregation = Some(input))
         } text "Events of the same type, produced by the same user will be aggregated with this time granularity: " +
                  "'second', 'minute', 'hour', 'week', 'month', 'quarter'. (Optional) - Default: 'hour'"