diff --git a/vignettes/parameters.Rmd b/vignettes/parameters.Rmd
index e70c970aa..cf22b1ddf 100644
--- a/vignettes/parameters.Rmd
+++ b/vignettes/parameters.Rmd
@@ -417,7 +417,7 @@ plot(result)
 ### From simulated model parameters
 
 ```{r fig.height=8}
-simulated_parameters <- simulate_model(model1, component = "conditional")
+simulated_parameters <<- simulate_model(model1, component = "conditional")
 result <- equivalence_test(simulated_parameters)
 result