diff --git a/src/interfaces/wallet.h b/src/interfaces/wallet.h
--- a/src/interfaces/wallet.h
+++ b/src/interfaces/wallet.h
@@ -7,6 +7,7 @@
 
 #include <amount.h>                 // For Amount
 #include <primitives/transaction.h> // For CTxOut
+#include <psbt.h>
 #include <pubkey.h> // For CKeyID and CScriptID (definitions needed in CTxDestination instantiation)
 #include <script/standard.h>           // For CTxDestination
 #include <support/allocators/secure.h> // For SecureString
@@ -189,6 +190,13 @@
                                         WalletOrderForm &order_form,
                                         bool &in_mempool, int &num_blocks) = 0;
 
+    //! Fill PSBT.
+    virtual TransactionError
+    fillPSBT(PartiallySignedTransaction &psbtx, bool &complete,
+             SigHashType sighash_type =
+                 SigHashType().withForkId() /* SIGHASH_ALL|FORKID */,
+             bool sign = true, bool bip32derivs = false) = 0;
+
     //! Get balances.
     virtual WalletBalances getBalances() = 0;
 
diff --git a/src/interfaces/wallet.cpp b/src/interfaces/wallet.cpp
--- a/src/interfaces/wallet.cpp
+++ b/src/interfaces/wallet.cpp
@@ -19,8 +19,8 @@
 #include <wallet/fees.h>
 #include <wallet/ismine.h>
 #include <wallet/load.h>
+#include <wallet/psbtwallet.h>
 #include <wallet/rpcdump.h>
-#include <wallet/rpcwallet.h>
 #include <wallet/wallet.h>
 
 namespace interfaces {
@@ -330,6 +330,14 @@
             }
             return {};
         }
+        TransactionError
+        fillPSBT(PartiallySignedTransaction &psbtx, bool &complete,
+                 SigHashType sighash_type =
+                     SigHashType().withForkId() /* SIGHASH_ALL|FORKID */,
+                 bool sign = true, bool bip32derivs = false) override {
+            return FillPSBT(m_wallet.get(), psbtx, complete, sighash_type, sign,
+                            bip32derivs);
+        }
         WalletBalances getBalances() override {
             const auto bal = m_wallet->GetBalance();
             WalletBalances result;