diff --git a/lib/experimental/class-wp-webfonts.php b/lib/experimental/class-wp-webfonts.php
index 02083d50cabc1..e40aca9e8671f 100644
--- a/lib/experimental/class-wp-webfonts.php
+++ b/lib/experimental/class-wp-webfonts.php
@@ -249,8 +249,8 @@ public function validate_webfont( $webfont ) {
 		}
 
 		$valid_props = array(
-			'ascend-override',
-			'descend-override',
+			'ascent-override',
+			'descent-override',
 			'font-display',
 			'font-family',
 			'font-stretch',
diff --git a/schemas/json/theme.json b/schemas/json/theme.json
index 807f44a0fa103..8f300a0858509 100644
--- a/schemas/json/theme.json
+++ b/schemas/json/theme.json
@@ -486,12 +486,12 @@
 													"description": "CSS font-stretch value.",
 													"type": "string"
 												},
-												"ascendOverride": {
-													"description": "CSS ascend-override value.",
+												"ascentOverride": {
+													"description": "CSS ascent-override value.",
 													"type": "string"
 												},
-												"descendOverride": {
-													"description": "CSS descend-override value.",
+												"descentOverride": {
+													"description": "CSS descent-override value.",
 													"type": "string"
 												},
 												"fontVariant": {