diff --git a/app/src/lib/format.ts b/app/src/lib/format.ts
index 039585a..c218012 100644
--- a/app/src/lib/format.ts
+++ b/app/src/lib/format.ts
@@ -1,3 +1,5 @@
+import type { SolistingStateCurrency } from '@solisting/sdk'
+
 export function abbrev(pk: string | null | undefined): string {
   if (!pk) return '—'
   return `${pk.slice(0, 4)}…${pk.slice(-4)}`
@@ -25,10 +27,14 @@ export function exact(ts: number): string {
   return new Date(ts * 1000).toUTCString()
 }
 
+type CurrencyWithSymbol =
+  | { __kind: 'Sol' }
+  | (Extract<SolistingStateCurrency, { __kind: 'Spl' }> & { symbol?: string })
+
 export function priceStr(
-  currency: { __kind: 'Sol' } | { __kind: 'Spl'; decimals: number; symbol?: string },
+  currency: CurrencyWithSymbol,
   price: bigint | number,
 ): string {
   if (currency.__kind === 'Sol') return fmtSol(price)
-  return fmtTok(price, currency.decimals, (currency as { symbol?: string }).symbol ?? 'SPL')
+  return fmtTok(price, currency.decimals, currency.symbol ?? 'SPL')
 }