diff --git a/packages/format-library/src/link/inline.js b/packages/format-library/src/link/inline.js
index cf712f173e51db..a4de03032da651 100644
--- a/packages/format-library/src/link/inline.js
+++ b/packages/format-library/src/link/inline.js
@@ -97,10 +97,10 @@ function InlineLinkUI( {
 			opensInNewTab: activeAttributes.target === '_blank',
 			nofollow: activeAttributes.rel?.includes( 'nofollow' ),
 			title: richTextText,
-			cssClasses: activeAttributes.className,
+			cssClasses: activeAttributes.class,
 		} ),
 		[
-			activeAttributes.className,
+			activeAttributes.class,
 			activeAttributes.id,
 			activeAttributes.rel,
 			activeAttributes.target,
diff --git a/packages/format-library/src/link/utils.js b/packages/format-library/src/link/utils.js
index ed379b3c4028db..4f64950efd457d 100644
--- a/packages/format-library/src/link/utils.js
+++ b/packages/format-library/src/link/utils.js
@@ -127,7 +127,7 @@ export function createLinkFormat( {
 	const trimmedCssClasses = cssClasses?.trim();
 
 	if ( trimmedCssClasses?.length ) {
-		format.attributes.className = trimmedCssClasses;
+		format.attributes.class = trimmedCssClasses;
 	}
 
 	return format;