diff --git a/easyvvuq/sampling/mc_sampler.py b/easyvvuq/sampling/mc_sampler.py
index cfab7d9f..5627588c 100644
--- a/easyvvuq/sampling/mc_sampler.py
+++ b/easyvvuq/sampling/mc_sampler.py
@@ -54,7 +54,6 @@ def __init__(self, vary, n_mc_samples, **kwargs):
         self.n_params = len(vary)
         # the number of MC samples, for each of the n_params + 2 input matrices
         self.n_mc_samples = n_mc_samples
-        self.vary = Vary(vary)
         self.count = 0
         # joint distribution
         self.joint = cp.J(*list(vary.values()))