diff --git a/rules.txt b/rules.txt
index 7dd8797..9cabdeb 100644
--- a/rules.txt
+++ b/rules.txt
@@ -12,7 +12,7 @@
 14	Sometimes the quickest way to find profits is to let them find you.
 15	Dead men close no deals.
 16	A deal is a deal... until a better one comes along.
-17	A contract is a contract is a contract... but only between Ferengi
+17	A contract is a contract is a contract... but only between Ferengi.
 18	A Ferengi without profit is no Ferengi at all.
 19	Satisfaction is not guaranteed.
 20	He who dives under the table today lives to profit tomorrow.