diff --git a/bdk-ffi/src/bdk.udl b/bdk-ffi/src/bdk.udl
index 539d49d3..99da5531 100644
--- a/bdk-ffi/src/bdk.udl
+++ b/bdk-ffi/src/bdk.udl
@@ -644,7 +644,7 @@ interface Wallet {
   ///
   /// The [`SignOptions`] can be used to tweak the behavior of the finalizer.
   [Throws=SignerError]
-  boolean finalize_psbt(Psbt psbt);
+  boolean finalize_psbt(Psbt psbt, SignOptions? sign_options);
 
   /// Compute the `tx`'s sent and received [`Amount`]s.
   ///
diff --git a/bdk-ffi/src/wallet.rs b/bdk-ffi/src/wallet.rs
index 6ef24140..c03c0eba 100644
--- a/bdk-ffi/src/wallet.rs
+++ b/bdk-ffi/src/wallet.rs
@@ -176,10 +176,19 @@ impl Wallet {
             .map_err(SignerError::from)
     }
 
-    pub fn finalize_psbt(&self, psbt: Arc<Psbt>) -> Result<bool, SignerError> {
+    pub fn finalize_psbt(
+        &self,
+        psbt: Arc<Psbt>,
+        sign_options: Option<SignOptions>,
+    ) -> Result<bool, SignerError> {
         let mut psbt = psbt.0.lock().unwrap();
+        let bdk_sign_options: BdkSignOptions = match sign_options {
+            Some(sign_options) => BdkSignOptions::from(sign_options),
+            None => BdkSignOptions::default()
+        };
+
         self.get_wallet()
-            .finalize_psbt(&mut psbt, BdkSignOptions::default())
+            .finalize_psbt(&mut psbt, bdk_sign_options)
             .map_err(SignerError::from)
     }