diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index 196a589ae..2746a5b5d 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -12651,6 +12651,15 @@ bool wallet2::check_reserve_proof(const cryptonote::account_public_address &addr
   catch(...) {}
 
   THROW_WALLET_EXCEPTION_IF(!loaded, error::wallet_internal_error, "Failed to parse reserve proof signature data");
+
+  std::unordered_set<crypto::key_image> seen_key_images;
+  std::set<std::pair<crypto::hash, uint64_t>> seen_outputs;
+  for (const reserve_proof_entry &proof : proofs)
+  {
+    THROW_WALLET_EXCEPTION_IF(!seen_key_images.insert(proof.key_image).second, error::wallet_internal_error, "Duplicate key image in reserve proof");
+    THROW_WALLET_EXCEPTION_IF(!seen_outputs.emplace(proof.txid, proof.index_in_tx).second, error::wallet_internal_error, "Duplicate output in reserve proof");
+  }
+
   THROW_WALLET_EXCEPTION_IF(subaddr_spendkeys.count(address.m_spend_public_key) == 0, error::wallet_internal_error,
     "The given address isn't found in the proof");