diff --git a/lib/galaxy/datatypes/binary.py b/lib/galaxy/datatypes/binary.py
index 2507d050b28..fa7e99102d4 100644
--- a/lib/galaxy/datatypes/binary.py
+++ b/lib/galaxy/datatypes/binary.py
@@ -1107,7 +1107,7 @@ class Cool(H5):
             return "Cool (HDF5) file (%s)." % (nice_size(dataset.get_size()))
 
 
-class MCool(Cool):
+class MCool(H5):
     """
     Class describing the multi-resolution cool format (https://github.com/mirnylab/cooler)
     """