diff --git a/routes/services/invisiblepuzzle/invisiblepuzzle.js b/routes/services/invisiblepuzzle/invisiblepuzzle.js
index 61df7c5c6590fafc417c9a0b14d1347f1e1624d5..22b50bd180d34ddba1fc8d52ad1cb8f2d136a3be 100644
--- a/routes/services/invisiblepuzzle/invisiblepuzzle.js
+++ b/routes/services/invisiblepuzzle/invisiblepuzzle.js
@@ -309,6 +309,7 @@ router.get('/sonifications/bylevel', function(req, res, next) {
                 $match: {
                     "appdata.appname" : "Invisible Puzzle",
                     "userdata.event" : "exploration",
+                    "appdata.voiceover": true,
                     "debug" : false
                 }
             },