diff --git a/render.py b/render.py
index f5e1499..83aaf21 100644
--- a/render.py
+++ b/render.py
@@ -220,7 +220,7 @@ def compose(clips, fragment, target=150, base=1024, voice_over=None, options=Non
                 gap = (5 * fps + random_int(seq, 10 * fps)) / fps
             else:
                 gap = (2 * fps + random_int(seq, 5 * fps)) / fps
-            gap = format_duration(gps, fps)
+            gap = format_duration(gap, fps)
             if int((sub_offset + gap)* fps) > scene_duration:
                 gap = format_duration((scene_duration - int(sub_offset * fps)) / fps, fps)
             scene['audio-center']['A1'].append({