diff --git a/km3io/offline.py b/km3io/offline.py
index 14c6318551ecfdaac2b51c3bffc78c68a60369cf..d38578d60de688b9de16ec809bee81dcf92ca7ac 100644
--- a/km3io/offline.py
+++ b/km3io/offline.py
@@ -4,6 +4,7 @@ import warnings
 import uproot
 import numpy as np
 import awkward as ak
+import awkward._io  # workaround for https://github.com/scikit-hep/awkward-1.0/issues/968
 
 from .definitions import mc_header
 from .tools import cached_property, to_num, unfold_indices