diff --git a/src/wp-content/themes/twentytwentyfour/theme.json b/src/wp-content/themes/twentytwentyfour/theme.json
index 7988b1af5c..2586fcab0a 100644
--- a/src/wp-content/themes/twentytwentyfour/theme.json
+++ b/src/wp-content/themes/twentytwentyfour/theme.json
@@ -247,7 +247,7 @@
 				{
 					"fontFamily": "Iowan Old Style, Apple Garamond, Baskerville, Times New Roman, Droid Serif, Times, Source Serif Pro, serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol",
 					"name": "System Serif",
-					"slug": "system-Serif"
+					"slug": "system-serif"
 				}
 			],
 			"fontSizes": [