diff --git a/docs/api/transaction.md b/docs/api/transaction.md
index 55ca5a3..c2ec3cf 100644
--- a/docs/api/transaction.md
+++ b/docs/api/transaction.md
@@ -305,7 +305,7 @@ TransactionInput(txid, vout, script_sig=None, sequence=0xFFFFFFFF, witness=None)
 - `txid: bytes` - `32` bytes, txid of the transaction this input is spending.
 - `vout: int` - index of the output this input is spending.
 - `script_sig: script.Script` - input script sig, if `None` (default) - it will create an empty script sig.
-- `sequence = 0xFFFFFFFF` - sequence number. For Replace-by-fee set it to lower value for example `0xfffffffe`. Also used by timelocked transaction, see [BIP-68](https://github.com/bitcoin/bips/blob/master/bip-0068.mediawiki).
+- `sequence = 0xFFFFFFFF` - sequence number. For Replace-by-fee set it to lower value for example `0xfffffffd`. Also used by timelocked transaction, see [BIP-68](https://github.com/bitcoin/bips/blob/master/bip-0068.mediawiki).
 - `witness: script.Witness` - input witness, if `None` (default) - set to empty witness.
 
 Serialization and parsing is done as usual - `from_string(hex)`, `to_string()`, `parse(bytes)`, `serialize()`, `read_from(stream)`, `write_to(stream)`.
diff --git a/src/embit/psbt.py b/src/embit/psbt.py
index 7b27114..69ca98b 100644
--- a/src/embit/psbt.py
+++ b/src/embit/psbt.py
@@ -679,8 +679,27 @@ class PSBT(EmbitBase):
         so if PSBT is asking to sign with a different sighash this function won't sign.
         If you want to sign with sighashes provided in the PSBT - set sighash=None.
         """
+        # check if it's a descriptor
+        if hasattr(root, "keys"):
+            counter = 0
+            for k in root.keys:
+                if hasattr(k, "is_private") and k.is_private:
+                    counter += self.sign_with(k, sighash)
+            return counter
+
         # if WIF - fingerprint is None
-        fingerprint = None if not hasattr(root, "child") else root.child(0).fingerprint
+        fingerprint = None
+        # if descriptor key
+        if hasattr(root, "origin"):
+            if not root.is_private: # pubkey can't sign
+                return 0
+            if root.is_extended: # use fingerprint only for HDKey
+                fingerprint = root.fingerprint
+            else:
+                root = root.key # WIF key
+        # if HDKey
+        if not fingerprint and hasattr(root, "my_fingerprint"):
+            fingerprint = root.my_fingerprint
         if not fingerprint:
             pub = root.get_public_key()
             sec = pub.sec()
@@ -726,7 +745,16 @@ class PSBT(EmbitBase):
                     for pub in inp.bip32_derivations:
                         # check if it is root key
                         if inp.bip32_derivations[pub].fingerprint == fingerprint:
-                            hdkey = root.derive(inp.bip32_derivations[pub].derivation)
+                            der = inp.bip32_derivations[pub].derivation
+                            if hasattr(root, "origin"):
+                                # for descriptor key remove origin part
+                                if root.origin:
+                                    if root.origin.derivation != der[:len(root.origin.derivation)]:
+                                        continue
+                                    der = der[len(root.origin.derivation):]
+                                hdkey = root.key.derive(der)
+                            else:
+                                hdkey = root.derive(der)
                             mypub = hdkey.key.get_public_key()
                             if mypub != pub:
                                 raise PSBTError("Derivation path doesn't look right")
@@ -755,7 +783,16 @@ class PSBT(EmbitBase):
             for pub in inp.bip32_derivations:
                 # check if it is root key
                 if inp.bip32_derivations[pub].fingerprint == fingerprint:
-                    hdkey = root.derive(inp.bip32_derivations[pub].derivation)
+                    der = inp.bip32_derivations[pub].derivation
+                    if hasattr(root, "origin"):
+                        # for descriptor key remove origin part
+                        if root.origin:
+                            if root.origin.derivation != der[:len(root.origin.derivation)]:
+                                continue
+                            der = der[len(root.origin.derivation):]
+                        hdkey = root.key.derive(der)
+                    else:
+                        hdkey = root.derive(der)
                     mypub = hdkey.key.get_public_key()
                     if mypub != pub:
                         raise PSBTError("Derivation path doesn't look right")