diff --git a/extensions/css-language-features/client/src/customData.ts b/extensions/css-language-features/client/src/customData.ts
index b6db79db75de5980b2b64cd04790a134ba50397b..b812b133ddc3a52a73ff0d06cbf33d3e0e9cb540 100644
--- a/extensions/css-language-features/client/src/customData.ts
+++ b/extensions/css-language-features/client/src/customData.ts
@@ -49,7 +49,7 @@ export function getCustomDataPathsFromAllExtensions(): string[] {
 		const contributes = extension.packageJSON && extension.packageJSON.contributes;
 
 		if (contributes && contributes.css && contributes.css.experimental.customData && Array.isArray(contributes.css.experimental.customData)) {
-			const relativePaths: string[] = contributes.css.customData;
+			const relativePaths: string[] = contributes.css.experimental.customData;
 			relativePaths.forEach(rp => {
 				dataPaths.push(path.resolve(extension.extensionPath, rp));
 			});
diff --git a/extensions/html-language-features/client/src/customData.ts b/extensions/html-language-features/client/src/customData.ts
index 2c8c7615a35a45f5639e3f9180f811003373ad41..d716c0ae347e2c1abdc7e81cfdae33552ff6b955 100644
--- a/extensions/html-language-features/client/src/customData.ts
+++ b/extensions/html-language-features/client/src/customData.ts
@@ -55,7 +55,7 @@ export function getCustomDataPathsFromAllExtensions(): string[] {
 			contributes.html.experimental.customData &&
 			Array.isArray(contributes.html.experimental.customData)
 		) {
-			const relativePaths: string[] = contributes.html.customData;
+			const relativePaths: string[] = contributes.html.experimental.customData;
 			relativePaths.forEach(rp => {
 				dataPaths.push(path.resolve(extension.extensionPath, rp));
 			});