diff --git a/packages/kit/src/runtime/server/page/actions.js b/packages/kit/src/runtime/server/page/actions.js
index b4578a08d17f..02c038d5e814 100644
--- a/packages/kit/src/runtime/server/page/actions.js
+++ b/packages/kit/src/runtime/server/page/actions.js
@@ -181,7 +181,9 @@ export async function call_action(event, actions) {
 	}
 
 	if (!is_form_content_type(event.request)) {
-		throw new Error(`Actions expect form-encoded data (received ${type})`);
+		throw new Error(
+			`Actions expect form-encoded data (received ${event.request.headers.get('content-type')}`
+		);
 	}
 
 	return action(event);