diff --git a/src/wallet/test/fuzz/scriptpubkeyman.cpp b/src/wallet/test/fuzz/scriptpubkeyman.cpp
index 835470aeae99a..1066a3c268da2 100644
--- a/src/wallet/test/fuzz/scriptpubkeyman.cpp
+++ b/src/wallet/test/fuzz/scriptpubkeyman.cpp
@@ -94,6 +94,7 @@ FUZZ_TARGET(scriptpubkeyman, .init = initialize_spkm)
         LOCK(wallet.cs_wallet);
         wallet.SetWalletFlag(WALLET_FLAG_DESCRIPTORS);
         wallet.SetLastBlockProcessed(chainstate.m_chain.Height(), chainstate.m_chain.Tip()->GetBlockHash());
+        wallet.m_keypool_size = 10;
     }
 
     auto wallet_desc{CreateWalletDescriptor(fuzzed_data_provider)};