diff --git a/model-basics.Rmd b/model-basics.Rmd
index 0a662a8..fb3febc 100644
--- a/model-basics.Rmd
+++ b/model-basics.Rmd
@@ -338,7 +338,7 @@ The way that R adds the intercept to the model is just by having a column that i
 model_matrix(df, y ~ x1 - 1)
 ```
 
-The model matrix grows in an unsurprising way when you add more variables to the the model:
+The model matrix grows in an unsurprising way when you add more variables to the model:
 
 ```{r}
 model_matrix(df, y ~ x1 + x2)