diff --git a/src/actions/register.ts b/src/actions/register.ts
index 78edb645a2..5e4f9c5173 100644
--- a/src/actions/register.ts
+++ b/src/actions/register.ts
@@ -52,6 +52,7 @@ export async function register(
 			String(formData.get("look") ?? "")
 				.normalize("NFC")
 				.trim() || DEFAULT_LOOK,
+		termsAccepted: formData.get("terms") === "on",
 	};
 
 	const parsed = registerSchema.safeParse(raw);
@@ -76,6 +77,10 @@ export async function register(
 			return "Captcha verification failed. Please try again.";
 	}
 
+	// Terms acceptance check.
+	if (!raw.termsAccepted)
+		return "You must accept the terms and conditions to register.";
+
 	// VPN/proxy block (only when enabled in /admin/vpn).
 	if ((await checkVpn(ip)).blocked) {
 		return (