diff --git a/doc/release-notes.md b/doc/release-notes.md
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -3,3 +3,13 @@
   <https://download.bitcoinabc.org/0.21.10/>
 
 This release includes the following features and fixes:
+
+Updated RPCs
+------------
+
+The `utxoupdatepsbt` RPC method has been updated to take a `descriptors`
+argument. When provided, input and output scripts and keys will be filled in
+when known.
+
+See the RPC help text for full details.
+
diff --git a/src/rpc/client.cpp b/src/rpc/client.cpp
--- a/src/rpc/client.cpp
+++ b/src/rpc/client.cpp
@@ -29,6 +29,7 @@
     {"mockscheduler", 0, "delta_time"},
     {"generate", 0, "nblocks"},
     {"generate", 1, "maxtries"},
+    {"utxoupdatepsbt", 1, "descriptors"},
     {"generatetoaddress", 0, "nblocks"},
     {"generatetoaddress", 2, "maxtries"},
     {"getnetworkhashps", 0, "nblocks"},
diff --git a/src/rpc/rawtransaction.cpp b/src/rpc/rawtransaction.cpp
--- a/src/rpc/rawtransaction.cpp
+++ b/src/rpc/rawtransaction.cpp
@@ -1957,7 +1957,7 @@
     { "rawtransactions",    "finalizepsbt",              finalizepsbt,              {"psbt", "extract"} },
     { "rawtransactions",    "createpsbt",                createpsbt,                {"inputs","outputs","locktime"} },
     { "rawtransactions",    "converttopsbt",             converttopsbt,             {"hexstring","permitsigdata"} },
-    { "rawtransactions",    "utxoupdatepsbt",            utxoupdatepsbt,            {"psbt"} },
+    { "rawtransactions",    "utxoupdatepsbt",            utxoupdatepsbt,            {"psbt", "descriptors"} },
     { "rawtransactions",    "joinpsbts",                 joinpsbts,                 {"txs"} },
     { "rawtransactions",    "analyzepsbt",               analyzepsbt,               {"psbt"} },
     { "blockchain",         "gettxoutproof",             gettxoutproof,             {"txids", "blockhash"} },
diff --git a/test/functional/rpc_psbt.py b/test/functional/rpc_psbt.py
--- a/test/functional/rpc_psbt.py
+++ b/test/functional/rpc_psbt.py
@@ -304,7 +304,7 @@
         # Try again, now while providing descriptors
         descs = [self.nodes[1].getaddressinfo(addr)['desc'] for addr in [
             addr1, addr2, addr3]]
-        updated = self.nodes[1].utxoupdatepsbt(psbt, descs)
+        updated = self.nodes[1].utxoupdatepsbt(psbt=psbt, descriptors=descs)
         decoded = self.nodes[1].decodepsbt(updated)
         # we do not have 'witness UTXO'
         test_psbt_input_keys(decoded['inputs'][1], [])