diff --git a/hierarc/Sampling/mcmc_sampling.py b/hierarc/Sampling/mcmc_sampling.py
index 870e88c..dd14c38 100644
--- a/hierarc/Sampling/mcmc_sampling.py
+++ b/hierarc/Sampling/mcmc_sampling.py
@@ -9,7 +9,7 @@ class MCMCSampler(object):
     def __init__(self, *args, **kwargs):
         """Initialise the classes of the chain and for parameter options :param args:
 
-        positional arguments for the CosmoLikelihood() instance
+        :param args: positional arguments for the CosmoLikelihood() instance
         :param kwargs: keyword arguments for the CosmoLikelihood() instance.
         """
         self.chain = CosmoLikelihood(*args, **kwargs)