diff --git a/src/wallet/scriptpubkeyman.cpp b/src/wallet/scriptpubkeyman.cpp
index c13fddfaf3f..259bfcd76d1 100644
--- a/src/wallet/scriptpubkeyman.cpp
+++ b/src/wallet/scriptpubkeyman.cpp
@@ -386,6 +386,8 @@ bool LegacyScriptPubKeyMan::AddKeyPubKey(const CKey& secret, const CPubKey &pubk
 
 bool LegacyScriptPubKeyMan::AddKeyPubKeyWithDB(WalletBatch& batch, const CKey& secret, const CPubKey& pubkey)
 {
+    AssertLockHeld(cs_wallet);
+
     // Make sure we aren't adding private keys to private key disabled wallets
     assert(!m_storage.IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS));