diff --git a/src/facilities/studio/studioCharts.js b/src/facilities/studio/studioCharts.js
index b6ccf29441f6c0c777c52b2ca1ab634c9ab48a4a..f53a013c3d11a8994788f767e306ae3e4d5780d5 100644
--- a/src/facilities/studio/studioCharts.js
+++ b/src/facilities/studio/studioCharts.js
@@ -97,7 +97,7 @@ App.Porn.makeFameProgressChart = function(slave) {
 App.Porn.makeViewershipChart = function(slave) {
 	const container = document.createElement("div");
 
-	const data = {name: "Total viewership", children: []};
+	const data = {name: "Total viewership", children: [], value:0};
 	for (const type of Object.values(App.Porn.GenreType)) {
 		const child = {name: type, children: []};
 		for (const genre of App.Porn.getGenresByType(type)) {