diff --git a/postgres/adding-composite-uniqueness-constraints.md b/postgres/adding-composite-uniqueness-constraints.md
index 2fa0d85..986791c 100644
--- a/postgres/adding-composite-uniqueness-constraints.md
+++ b/postgres/adding-composite-uniqueness-constraints.md
@@ -1,6 +1,6 @@
 # Adding Composite Uniqueness Constraints
 
-There are two ways in Postgres to create a composite uniqueness constraint,
+There are two ways in Postgres to create a composite uniqueness constraint;
 that is, a constraint that ensures that the combination of two or more
 values on a table only appear once. For the following two code snippets,
 assume that we have a table relating Pokemon and Trainers and that our