diff --git a/librewolf.cfg b/librewolf.cfg
index c9bb2e3..63e083d 100644
--- a/librewolf.cfg
+++ b/librewolf.cfg
@@ -462,7 +462,7 @@ lockPref("browser.urlbar.oneOffSearches", false);
 lockPref("network.auth.subresource-img-cross-origin-http-auth-allow", false); //Deprecated Active
 lockPref("browser.shell.shortcutFavicons", false);
 lockPref("alerts.showFavicons", false); // default: false
-lockPref("security.ssl.require_safe_negotiation", true);
+defaultPref("security.ssl.require_safe_negotiation", true);
 lockPref("security.tls.enable_0rtt_data", false); // (FF55+ default true)
 lockPref("browser.xul.error_pages.expert_bad_cert", true);
 lockPref("font.blacklist.underline_offset", "");