diff --git a/visualize.Rmd b/visualize.Rmd
index bedbb32..2266d08 100644
--- a/visualize.Rmd
+++ b/visualize.Rmd
@@ -438,7 +438,7 @@ ggplot(data = mpg, mapping = aes(x = displ, y = hwy)) +
     ```{r echo = FALSE, fig.width = 3, out.width = "50%", fig.align = "default", message = FALSE}
     ggplot(data = mpg, mapping = aes(x = displ, y = hwy)) + 
       geom_point() + 
-      geom_smooth(aes(group = drv), se = FALSE)
+      geom_smooth(se = FALSE)
     ggplot(data = mpg, mapping = aes(x = displ, y = hwy)) + 
       geom_smooth(aes(group = drv), se = FALSE) +
       geom_point()