diff --git a/bdk-ffi/src/bdk.udl b/bdk-ffi/src/bdk.udl
index 24a2c1ed..41f6313a 100644
--- a/bdk-ffi/src/bdk.udl
+++ b/bdk-ffi/src/bdk.udl
@@ -391,6 +391,8 @@ interface Wallet {
   [Name=load, Throws=LoadWithPersistError]
   constructor(Descriptor descriptor, Descriptor change_descriptor, Connection connection);
 
+  u32? derivation_index(KeychainKind keychain);
+
   AddressInfo reveal_next_address(KeychainKind keychain);
 
   Network network();
diff --git a/bdk-ffi/src/wallet.rs b/bdk-ffi/src/wallet.rs
index 2a374399..8d6d632b 100644
--- a/bdk-ffi/src/wallet.rs
+++ b/bdk-ffi/src/wallet.rs
@@ -85,6 +85,10 @@ impl Wallet {
             .map_err(CannotConnectError::from)
     }
 
+    pub(crate) fn derivation_index(&self, keychain: KeychainKind) -> Option<u32> {
+        self.get_wallet().derivation_index(keychain)
+    }
+
     pub fn network(&self) -> Network {
         self.get_wallet().network()
     }