diff --git a/ffplayout/utils.py b/ffplayout/utils.py
index 39914ba1..9a41e587 100644
--- a/ffplayout/utils.py
+++ b/ffplayout/utils.py
@@ -768,7 +768,7 @@ def gen_filler(node):
     """
     probe = MediaProbe()
     probe.load(_storage.filler)
-    duration = node['out'] - node['seek'] + 1
+    duration = node['out'] - node['seek']
 
     node['probe'] = probe