diff --git a/src/core/features/course/components/module/module.ts b/src/core/features/course/components/module/module.ts
index 5b34bd98d..29676e4ca 100644
--- a/src/core/features/course/components/module/module.ts
+++ b/src/core/features/course/components/module/module.ts
@@ -66,7 +66,9 @@ export class CoreCourseModuleComponent implements OnInit, OnDestroy {
      */
     async ngOnInit(): Promise<void> {
         this.modNameTranslated = CoreCourse.translateModuleName(this.module.modname) || '';
-        this.showLegacyCompletion = this.showLegacyCompletion ?? !CoreSites.getCurrentSite()?.isVersionGreaterEqualThan('3.11');
+        this.showLegacyCompletion = this.showLegacyCompletion ??
+            CoreConstants.CONFIG.uselegacycompletion ??
+            !CoreSites.getCurrentSite()?.isVersionGreaterEqualThan('3.11');
         this.checkShowManualCompletion();
 
         if (!this.module.handlerData) {
diff --git a/src/types/config.d.ts b/src/types/config.d.ts
index ef8c23349..ef01af18a 100644
--- a/src/types/config.d.ts
+++ b/src/types/config.d.ts
@@ -65,4 +65,5 @@ export interface EnvironmentConfig {
     wsrequestqueuedelay: number; // Maximum number of miliseconds to wait before processing the queue.
     calendarreminderdefaultvalue: number; // Initial value for default reminders (in seconds). User can change it later.
     removeaccountonlogout?: boolean; // True to remove the account when the user clicks logout. Doesn't affect switch account.
+    uselegacycompletion?: boolean; // Whether to use legacy completion by default in all course formats.
 }