diff --git a/src/settings/controllers/SystemFontController.ts b/src/settings/controllers/SystemFontController.ts
index 4f591efc17..e31077e4c8 100644
--- a/src/settings/controllers/SystemFontController.ts
+++ b/src/settings/controllers/SystemFontController.ts
@@ -25,7 +25,7 @@ export default class SystemFontController extends SettingController {
         super();
     }
 
-    onChange(level, roomId, newValue) {
+    public onChange(level, roomId, newValue) {
         // Dispatch font size change so that everything open responds to the change.
         dis.dispatch<UpdateSystemFontPayload>({
             action: Action.UpdateSystemFont,
diff --git a/src/settings/controllers/UseSystemFontController.ts b/src/settings/controllers/UseSystemFontController.ts
index d598b25962..07a80c7d38 100644
--- a/src/settings/controllers/UseSystemFontController.ts
+++ b/src/settings/controllers/UseSystemFontController.ts
@@ -25,7 +25,7 @@ export default class UseSystemFontController extends SettingController {
         super();
     }
 
-    onChange(level, roomId, newValue) {
+    public onChange(level, roomId, newValue) {
         // Dispatch font size change so that everything open responds to the change.
         dis.dispatch<UpdateSystemFontPayload>({
             action: Action.UpdateSystemFont,