diff --git a/jass/models/inittable.py b/jass/models/inittable.py
index f0d2e0dff1510d71ee1f357e510f004270785314..0afe589ff69d8c124e48fa53d7e88bfbb19211fd 100644
--- a/jass/models/inittable.py
+++ b/jass/models/inittable.py
@@ -17,7 +17,7 @@ from functools import reduce
 options.mode.chained_assignment = None
 warnings.filterwarnings("ignore", category=tables.NaturalNameWarning)
 
-valideInitTableNamePattern = re.compile("^([A-Z]*[a-z]*-*\.?[0-9]*)+$")
+valideInitTableNamePattern = re.compile("([a-zA-Z0-9_-]+).hdf5") #re.compile("^([A-Z]*[a-z]*-*\.?[0-9]*)+$")
 
 class InitMeta(object):
     def __init__(self, nb_snps, nb_phenotypes):