diff --git a/internal/start/start.go b/internal/start/start.go
index 98c958cab..38e000089 100644
--- a/internal/start/start.go
+++ b/internal/start/start.go
@@ -380,6 +380,7 @@ EOF
 			"GOTRUE_SITE_URL=" + utils.Config.Auth.SiteUrl,
 			"GOTRUE_URI_ALLOW_LIST=" + strings.Join(utils.Config.Auth.AdditionalRedirectUrls, ","),
 			fmt.Sprintf("GOTRUE_DISABLE_SIGNUP=%v", !utils.Config.Auth.EnableSignup),
+			fmt.Sprintf("GOTRUE_SECURITY_MANUAL_LINKING_ENABLED=%v", utils.Config.Auth.EnableManualLinking)
 
 			"GOTRUE_JWT_ADMIN_ROLES=service_role",
 			"GOTRUE_JWT_AUD=authenticated",