diff --git a/pitivi/timeline/ruler.py b/pitivi/timeline/ruler.py
index 0d9e08dbbc3c2297d9d6eb337ec5afdc80dddea5..3fbb3d505fe082baa4c37f4fcf84908810bbba73 100644
--- a/pitivi/timeline/ruler.py
+++ b/pitivi/timeline/ruler.py
@@ -238,9 +238,10 @@ class ScaleRuler(Gtk.DrawingArea, Zoomable, Loggable):
             timeline_duration = self.timeline.ges_timeline.props.duration
             if position > timeline_duration:
                 position = timeline_duration
-        human_time = beautify_length(position)
-        cur_frame = self.timeline.ges_timeline.get_frame_at(position) + 1
-        self.set_tooltip_text(human_time + "\n" + _("Frame #%d") % cur_frame)
+        if position > 0:
+            human_time = beautify_length(position)
+            cur_frame = self.timeline.ges_timeline.get_frame_at(position) + 1
+            self.set_tooltip_text(human_time + "\n" + _("Frame #%d") % cur_frame)
 
 # Drawing methods