diff --git a/app/soapbox/utils/features.ts b/app/soapbox/utils/features.ts
index 9aff34a90..36e2811ab 100644
--- a/app/soapbox/utils/features.ts
+++ b/app/soapbox/utils/features.ts
@@ -600,7 +600,7 @@ const getInstanceFeatures = (instance: Instance) => {
     /**
      * Can sign in using username instead of e-mail address.
      */
-    logInWithUsername: v.software === PLEROMA,
+    logInWithUsername: v.software === PLEROMA || v.software === TRUTHSOCIAL,
 
     /**
      * Can perform moderation actions with account and reports.