diff --git a/resources/views/tasks/time_tracker_knockout.blade.php b/resources/views/tasks/time_tracker_knockout.blade.php
index 75baa4e0a140..01d684087e6d 100644
--- a/resources/views/tasks/time_tracker_knockout.blade.php
+++ b/resources/views/tasks/time_tracker_knockout.blade.php
@@ -84,8 +84,11 @@
           if (field == 'start_time') {
               setTimeout(function() {
                   $input = $(element).closest('td').next('td').find('input');
-                  $input.timepicker('option', 'durationTime', $(element).val());
-                  $input.timepicker('option', 'minTime', $(element).val());
+                  var value = $(element).val();
+                  if (value) {
+                      $input.timepicker('option', 'durationTime', value);
+                      $input.timepicker('option', 'minTime', value);
+                  }
               }, 1);
           }
         }
@@ -1214,7 +1217,6 @@
             }
         });
 
-
     }
 
 </script>