diff --git a/data/glossaries/external.yml b/data/glossaries/external.yml
index 2bc6c75053..6d0789bd43 100644
--- a/data/glossaries/external.yml
+++ b/data/glossaries/external.yml
@@ -746,7 +746,7 @@
     When talking about a branch or a fork, the primary branch on the original
     repository is often referred to as the "upstream", since that is the main
     place that other changes will come in from. The branch/fork you are working
-    on is then called the "downstream". Also called origin.
+    on is then called the "downstream." Also called origin.
 - term: upstream branch
   description: >-
     The default branch that is merged into the branch in question (or the branch