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-rw-r--r--src/lib/invoice.ts2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/lib/invoice.ts b/src/lib/invoice.ts
index d7576e82..91a69d88 100644
--- a/src/lib/invoice.ts
+++ b/src/lib/invoice.ts
@@ -15,7 +15,7 @@ export default async ({ cookies, request }) => {
items: JSON.parse(form.get("items")),
memo: form.get("memo"),
memoPrompt: form.get("memoPrompt"),
- tip: parseInt(form.get("tip")) || 0,
+ tip: form.get("tip") ?? null,
type: form.get("type"),
prompt: form.get("prompt") === "true",
rate: parseFloat(form.get("rate")) || rates[form.get("currency")],