diff --git a/base-R.qmd b/base-R.qmd
index ec97271..f0d0cd4 100644
--- a/base-R.qmd
+++ b/base-R.qmd
@@ -138,7 +138,7 @@ df2[, "x"]
 One way to avoid this ambiguity with `data.frame`s is to explicitly specify `drop = FALSE`:
 
 ```{r}
-df1["x", , drop = FALSE]
+df1[, "x", drop = FALSE]
 ```
 
 ### dplyr equivalents