diff --git a/packages/edit-site/src/components/global-styles/font-library-modal/utils/get-intersecting-font-faces.js b/packages/edit-site/src/components/global-styles/font-library-modal/utils/get-intersecting-font-faces.js
index a3ffd31db2288..9a65bb6af80d3 100644
--- a/packages/edit-site/src/components/global-styles/font-library-modal/utils/get-intersecting-font-faces.js
+++ b/packages/edit-site/src/components/global-styles/font-library-modal/utils/get-intersecting-font-faces.js
@@ -37,7 +37,7 @@ export default function getIntersectingFontFaces( incoming, existing ) {
 
 		if ( existingFont ) {
 			if ( incomingFont?.fontFace ) {
-				const matchingFaces = incomingFont.fontFace.filter(
+				const matchingFaces = ( incomingFont.fontFace || [] ).filter(
 					( face ) => {
 						return ( existingFont?.fontFace || [] ).find( ( f ) => {
 							return (
diff --git a/packages/edit-site/src/components/global-styles/font-library-modal/utils/index.js b/packages/edit-site/src/components/global-styles/font-library-modal/utils/index.js
index e3d3393b9b299..0113658ac2238 100644
--- a/packages/edit-site/src/components/global-styles/font-library-modal/utils/index.js
+++ b/packages/edit-site/src/components/global-styles/font-library-modal/utils/index.js
@@ -138,7 +138,7 @@ export function getPreviewStyle( family ) {
 
 	if ( family.fontFace ) {
 		//get all the font faces with normal style
-		const normalFaces = family.fontFace.filter(
+		const normalFaces = ( family.fontFace || [] ).filter(
 			( face ) => face.fontStyle.toLowerCase() === 'normal'
 		);
 		if ( normalFaces.length > 0 ) {