diff --git a/impls/monero.ts/src/pending_transaction.ts b/impls/monero.ts/src/pending_transaction.ts
index 12ad7193..169332fd 100644
--- a/impls/monero.ts/src/pending_transaction.ts
+++ b/impls/monero.ts/src/pending_transaction.ts
@@ -43,10 +43,17 @@ export class PendingTransaction {
   }
 
   async commitUR(maxFragmentLength: number): Promise<string | null> {
-    const result = await getSymbol("PendingTransaction_commitUR")(
+    const commitUR = getSymbol("PendingTransaction_commitUR");
+
+    if (!commitUR) {
+      return null;
+    }
+
+    const result = await commitUR(
       this.#pendingTxPtr,
       maxFragmentLength,
     );
+
     if (!result) return null;
     await this.throwIfError();
     return await readCString(result) || null;
diff --git a/impls/monero.ts/src/symbols.ts b/impls/monero.ts/src/symbols.ts
index 0c91f38c..38707b8f 100644
--- a/impls/monero.ts/src/symbols.ts
+++ b/impls/monero.ts/src/symbols.ts
@@ -418,6 +418,7 @@ export const moneroSymbols = {
     result: "bool",
   },
   "MONERO_PendingTransaction_commitUR": {
+    optional: true,
     nonblocking: true,
     // void* pendingTx_ptr, int max_fragment_length
     parameters: ["pointer", "i32"],