diff --git a/BayesianKDEy/_bayeisan_kdey.py b/BayesianKDEy/_bayeisan_kdey.py
index 197deaf..3c58900 100644
--- a/BayesianKDEy/_bayeisan_kdey.py
+++ b/BayesianKDEy/_bayeisan_kdey.py
@@ -291,7 +291,7 @@ class BayesianKDEy(AggregativeSoftQuantifier, KDEBase, WithConfidenceABC):
         if alpha is not None:
             alpha = jnp.asarray(alpha)
             numpyro.factor(
-                'log_prior', dist.Dirichlet(alpha.log_prob(prev))
+                'log_prior', dist.Dirichlet(alpha).log_prob(prev)
             )
         # if alpha is None, then this corresponds to a weak logistic-normal prior