diff --git a/packages/edit-site/src/components/sidebar-navigation-screen-patterns/use-pattern-categories.js b/packages/edit-site/src/components/sidebar-navigation-screen-patterns/use-pattern-categories.js
index 4dee1bae3f314f..4d80d838ae90d5 100644
--- a/packages/edit-site/src/components/sidebar-navigation-screen-patterns/use-pattern-categories.js
+++ b/packages/edit-site/src/components/sidebar-navigation-screen-patterns/use-pattern-categories.js
@@ -95,7 +95,7 @@ export default function usePatternCategories() {
 		sortedCategories.unshift( {
 			name: PATTERN_DEFAULT_CATEGORY,
 			label: __( 'All patterns' ),
-			description: __( 'A list of all patterns from all sources' ),
+			description: __( 'A list of all patterns from all sources.' ),
 			count: themePatterns.length + userPatterns.length,
 		} );