diff --git a/workflow/engine/src/ProcessMaker/BusinessModel/Task.php b/workflow/engine/src/ProcessMaker/BusinessModel/Task.php
index d6b6c31f2..d2ac8fba8 100644
--- a/workflow/engine/src/ProcessMaker/BusinessModel/Task.php
+++ b/workflow/engine/src/ProcessMaker/BusinessModel/Task.php
@@ -321,7 +321,7 @@ class Task
             }
 
             //Validating TAS_TRANSFER_FLY value
-            if ($arrayProperty["TAS_TRANSFER_FLY"] == "TRUE") {
+            if ($arrayProperty["TAS_TRANSFER_FLY"] == "FALSE") {
                 if (!isset($arrayProperty["TAS_DURATION"])) {
                     throw (new \Exception("Invalid value specified for 'tas_duration'"));
                 }
diff --git a/workflow/engine/xmlform/tasks/tasks_TimingControl.xml b/workflow/engine/xmlform/tasks/tasks_TimingControl.xml
index 5f462988e..e76b99ca2 100755
--- a/workflow/engine/xmlform/tasks/tasks_TimingControl.xml
+++ b/workflow/engine/xmlform/tasks/tasks_TimingControl.xml
@@ -4,7 +4,7 @@
   <INDEX type="hidden"/>
   <IFORM type="hidden"/>
   <TAS_TRANSFER_FLY type="checkbox" value="TRUE" falsevalue="FALSE" defaultvalue="TRUE" group="1">
-    <en><![CDATA[Allow user defined timing control]]></en>
+    <en><![CDATA[Allow users to change the task duration in runtime]]></en>
   </TAS_TRANSFER_FLY>
   <TAS_DURATION type="text" size="3" maxlength="3" defaultvalue="1" required="1" validate="Any" mask="###" group="1" dependentfields="" linkfield="" strto="UPPER" readonly="0" noshowingrid="0" readonlyingrid="0" totalizeable="0" sqlconnection="">
     <en><![CDATA[Task duration]]></en>
@@ -23,7 +23,7 @@ SELECT CALENDAR_UID, CALENDAR_NAME FROM availableCalendars
 
 var toggleFields = function()
 {
-    if(getField('TAS_TRANSFER_FLY').checked == true)
+    if(getField('TAS_TRANSFER_FLY').checked == false)
     {
       showRowById('TAS_DURATION');
       showRowById('TAS_TIMEUNIT');