diff --git a/src/Cards/UserCard.vala b/src/Cards/UserCard.vala
index ea9742579..823a101a8 100644
--- a/src/Cards/UserCard.vala
+++ b/src/Cards/UserCard.vala
@@ -434,6 +434,18 @@ public class Greeter.UserCard : Greeter.BaseCard {
         settings.set_value ("xkb-options", options);
     }
 
+    /* 
+     * When we get string typed settings from our settings daemon account service we might get a null value.
+     * In this case we reset the value to avoid criticals and unwanted behaviour.
+     */
+    private void set_or_reset_settings_key (GLib.Settings settings, string key, GLib.Variant? value) {
+        if (value != null) {
+            settings.set_value (key, value);
+        } else {
+            settings.reset (key);
+        }
+    }
+
     private void set_mouse_touchpad_settings () {
         var mouse_settings = new GLib.Settings ("org.gnome.desktop.peripherals.mouse");
         mouse_settings.set_boolean ("left-handed", settings_act.left_handed);
@@ -461,9 +473,9 @@ public class Greeter.UserCard : Greeter.BaseCard {
         interface_settings.set_value ("cursor-size", settings_act.cursor_size);
         interface_settings.set_value ("locate-pointer", settings_act.locate_pointer);
         interface_settings.set_value ("text-scaling-factor", settings_act.text_scaling_factor);
-        interface_settings.set_value ("document-font-name", settings_act.document_font_name);
-        interface_settings.set_value ("font-name", settings_act.font_name);
-        interface_settings.set_value ("monospace-font-name", settings_act.monospace_font_name);
+        set_or_reset_settings_key (interface_settings, "document-font-name", settings_act.document_font_name);
+        set_or_reset_settings_key (interface_settings, "font-name", settings_act.font_name);
+        set_or_reset_settings_key (interface_settings, "monospace-font-name", settings_act.monospace_font_name);
 
         var touchscreen_settings = new GLib.Settings ("org.gnome.settings-daemon.peripherals.touchscreen");
         touchscreen_settings.set_boolean ("orientation-lock", settings_act.orientation_lock);