diff --git a/res/doc b/res/doc
index c644623..9943fda 100644
--- a/res/doc
+++ b/res/doc
@@ -37,6 +37,7 @@
 #                   kfmon          - TODO
 #                   nickel_setting - one of:
 #                                      invert      - toggles FeatureSettings.InvertScreen (all versions)
+#                                      lockscreen  - toggles PowerSettings.UnlockEnabled (4.12.12111+)
 #                                      screenshots - toggles FeatureSettings.Screenshots (all versions)
 #                   nickel_extras - the mimetype of the plugin, or one of:
 #                                      web_browser
diff --git a/src/action_cc.cc b/src/action_cc.cc
index 060ae8c..55e37f8 100644
--- a/src/action_cc.cc
+++ b/src/action_cc.cc
@@ -102,6 +102,29 @@ NM_ACTION_(nickel_setting) {
         } else if (!strcmp(arg, "screenshots")) {
             NM_RETURN_ERR("not implemented yet");
         }
+    } else if (!strcmp(arg, "lockscreen")) {
+        void *PowerSettings_vtable = dlsym(RTLD_DEFAULT, "_ZTV13PowerSettings");
+        NM_ASSERT(PowerSettings_vtable, "could not dlsym the vtable for PowerSettings");
+        vtable_ptr(settings) = vtable_target(PowerSettings_vtable);
+
+        if (!strcmp(arg, "lockscreen")) {
+            bool (*PowerSettings__getUnlockEnabled)(Settings*);
+            reinterpret_cast<void*&>(PowerSettings__getUnlockEnabled) = dlsym(RTLD_DEFAULT, "_ZN13PowerSettings16getUnlockEnabledEv");
+            NM_ASSERT(PowerSettings__getUnlockEnabled, "could not dlsym PowerSettings::getUnlockEnabled");
+
+            bool (*PowerSettings__setUnlockEnabled)(Settings*, bool);
+            reinterpret_cast<void*&>(PowerSettings__setUnlockEnabled) = dlsym(RTLD_DEFAULT, "_ZN13PowerSettings16setUnlockEnabledEb");
+            NM_ASSERT(PowerSettings__setUnlockEnabled, "could not dlsym PowerSettings::setUnlockEnabled");
+
+            v = PowerSettings__getUnlockEnabled(settings);
+            vtable_ptr(settings) = vtable_target(PowerSettings_vtable);
+
+            PowerSettings__setUnlockEnabled(settings, !v);
+            vtable_ptr(settings) = vtable_target(PowerSettings_vtable);
+
+            NM_ASSERT(PowerSettings__getUnlockEnabled(settings) == !v, "failed to set setting");
+            vtable_ptr(settings) = vtable_target(PowerSettings_vtable);
+        }
     } else {
         // TODO: more settings
         Settings_SettingsD(settings);