diff --git a/devsus/devsus.cfg b/devsus/devsus.cfg
index a8b4566..31b771e 100644
--- a/devsus/devsus.cfg
+++ b/devsus/devsus.cfg
@@ -10,7 +10,7 @@ defaultPref("toolkit.cosmeticAnimations.enabled", false);
 defaultPref("nglayout.progressive-paint", true);
 defaultPref("nglayout.initialpaint.delay", 0);
 defaultPref("lightweightThemes.selectedThemeID", "firefox-compact-dark@mozilla.org");
-defaultPref("ui.density", 1);
+defaultPref("browser.uidensity", 1);
 
 defaultPref("browser.reader.detectedFirstArticle", true);
 defaultPref("browser.startup.homepage_override.mstone", "ignore");