diff --git a/src/runtime/internal/ssr.ts b/src/runtime/internal/ssr.ts
index deb1ed836b..416267fa03 100644
--- a/src/runtime/internal/ssr.ts
+++ b/src/runtime/internal/ssr.ts
@@ -97,7 +97,7 @@ export function escape(html: string, is_attr = false) {
 }
 
 export function escape_attribute_value(value) {
-	return typeof value === 'string' ? escape(value) : value;
+	return typeof value === 'string' ? escape(value, true) : value;
 }
 
 export function escape_object(obj) {