diff --git a/js/ui/keyboard.js b/js/ui/keyboard.js
index 908655951..a8b90caa2 100644
--- a/js/ui/keyboard.js
+++ b/js/ui/keyboard.js
@@ -1259,7 +1259,7 @@ export const Keyboard = GObject.registerClass({
 
         this._clearShowIdle();
 
-        this._keyboardController.oskCompletion = false;
+        this._keyboardController.setOskCompletion(false);
         this._keyboardController.destroy();
 
         Main.layoutManager.untrackChrome(this);
@@ -1723,7 +1723,7 @@ export const Keyboard = GObject.registerClass({
             return;
         }
 
-        this._keyboardController.oskCompletion = true;
+        this._keyboardController.setOskCompletion(true);
         this._clearKeyboardRestTimer();
 
         if (immediate) {
@@ -1758,7 +1758,7 @@ export const Keyboard = GObject.registerClass({
         if (!this._keyboardVisible)
             return;
 
-        this._keyboardController.oskCompletion = false;
+        this._keyboardController.setOskCompletion(false);
         this._clearKeyboardRestTimer();
 
         if (immediate) {
@@ -2105,7 +2105,7 @@ class KeyboardController extends Signals.EventEmitter {
         Main.inputMethod.commit(str);
     }
 
-    async _setOskCompletion(enabled) {
+    async setOskCompletion(enabled) {
         if (this._oskCompletionEnabled === enabled)
             return;
 
@@ -2115,10 +2115,6 @@ class KeyboardController extends Signals.EventEmitter {
         Main.inputMethod.update();
     }
 
-    set oskCompletion(enabled) {
-        this._setOskCompletion(enabled);
-    }
-
     keyvalPress(keyval) {
         this._virtualDevice.notify_keyval(Clutter.get_current_event_time() * 1000,
             keyval, Clutter.KeyState.PRESSED);