diff --git a/src/mobility/waypoint.cc b/src/mobility/waypoint.cc
index ee891c627..32a356746 100644
--- a/src/mobility/waypoint.cc
+++ b/src/mobility/waypoint.cc
@@ -28,8 +28,8 @@ Waypoint::Waypoint (const Time &waypointTime, const Vector &waypointPosition)
   position (waypointPosition)
 {}
 Waypoint::Waypoint ()
-  : time (0.0),
-  position (0,0,0)
+  : time (Seconds (0.0)),
+    position (0,0,0)
 {}
 
 std::ostream &operator << (std::ostream &os, const Waypoint &waypoint)