diff --git a/apps/sleeplog/interface.html b/apps/sleeplog/interface.html
index 64fd0c73b..7c7fd9002 100644
--- a/apps/sleeplog/interface.html
+++ b/apps/sleeplog/interface.html
@@ -107,7 +107,7 @@ function deleteBefore(dateString, callback) {
       `.filter(file => (parseInt(file.match(/\\d+/)[0]) + 0.25) * 12096E5 < ` + date.valueOf() + `)` +
       `.map(file => require("Storage").erase(file)).length`, count => {
       Util.hideModal();
-      window.prompt(count + " files deleted");
+      window.alert(count + " files deleted");
       callback();
     })
   }