diff --git a/lib/rules/keyframe-selector-notation/README.md b/lib/rules/keyframe-selector-notation/README.md
index 650055bf0b..7597bc5b15 100644
--- a/lib/rules/keyframe-selector-notation/README.md
+++ b/lib/rules/keyframe-selector-notation/README.md
@@ -64,7 +64,7 @@ The following pattern is considered a problem:
 @keyframes foo { from {} 100% {} }
 ```
 
-The following pattern are _not_ considered problems:
+The following patterns are _not_ considered problems:
 
 <!-- prettier-ignore -->
 ```css