diff --git a/build-aux/flatpak/org.gnome.Calendar.json b/build-aux/flatpak/org.gnome.Calendar.json
index deadb32d..80f815f6 100644
--- a/build-aux/flatpak/org.gnome.Calendar.json
+++ b/build-aux/flatpak/org.gnome.Calendar.json
@@ -7,7 +7,7 @@
     "tags" : [
         "devel"
     ],
-    "desktop-file-name-prefix" : "(Development) ",
+    "desktop-file-name-suffix" : " (Nightly)",
     "finish-args" : [
         "--share=ipc",
         "--share=network",