diff --git a/joins.qmd b/joins.qmd
index 5c8dba1..d5ca351 100644
--- a/joins.qmd
+++ b/joins.qmd
@@ -174,7 +174,7 @@ flights2 <- flights |>
 flights2
 ```
 
-Surrogate keys can be particular useful when communicating to other humans: it's much easier to tell someone to take a look at flight 2001 than to say look at UA430 which departed 9am 2013-01-03.
+Surrogate keys can be particularly useful when communicating to other humans: it's much easier to tell someone to take a look at flight 2001 than to say look at UA430 which departed 9am 2013-01-03.
 
 ### Exercises