diff --git a/toolkit/modules/Troubleshoot.jsm b/toolkit/modules/Troubleshoot.jsm
index 21e8b3c79b..cea7c8f29d 100644
--- a/toolkit/modules/Troubleshoot.jsm
+++ b/toolkit/modules/Troubleshoot.jsm
@@ -55,7 +55,7 @@ const PREFS_WHITELIST = [
   "browser.urlbar.",
   "browser.zoom.",
   "dom.",
-  "extensions.checkCompatibility",
+  "extensions.enableCompatibilityChecking",
   "extensions.lastAppVersion",
   "font.",
   "general.autoScroll",