diff --git a/tutorials/09-variational-inference/index.qmd b/tutorials/09-variational-inference/index.qmd
index 56acb3208..ef9643756 100755
--- a/tutorials/09-variational-inference/index.qmd
+++ b/tutorials/09-variational-inference/index.qmd
@@ -332,7 +332,7 @@ test = Matrix(test_cut[:, remove_names]);
 # Bayesian linear regression.
 @model function linear_regression(x, y, n_obs, n_vars, ::Type{T}=Vector{Float64}) where {T}
     # Set variance prior.
-    σ² ~ truncated(Normal(0, 100), 0, Inf)
+    σ² ~ truncated(Normal(0, 100); lower=0)
 
     # Set intercept prior.
     intercept ~ Normal(0, 3)