diff --git a/packages/frontend/src/preferences/def.ts b/packages/frontend/src/preferences/def.ts
index e890265dc3..8d1d33977d 100644
--- a/packages/frontend/src/preferences/def.ts
+++ b/packages/frontend/src/preferences/def.ts
@@ -216,7 +216,7 @@ export const PREF_DEF = definePreferences({
 		default: !prefersReducedMotion,
 	},
 	animatedMfm: {
-		default: true,
+		default: !prefersReducedMotion,
 	},
 	advancedMfm: {
 		default: true,