diff --git a/src/validation.cpp b/src/validation.cpp
index 692c9b3340..e6ea80156a 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -357,7 +357,7 @@ bool VerifyPrivateTxOwn(const uint256& txid, const std::vector<unsigned char>& v
             return false;
         }
 
-        size_t count = 0;
+        uint32_t count = 0;
 
         for (const auto& pub : pubKeys) {
             ss << count;
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index 697c7a20bf..0462d22ffb 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -3363,7 +3363,7 @@ std::vector<unsigned char> CWallet::ProvePrivateTxOwn(const uint256& txid, const
             return result;
         }
         const auto& serials = joinsplit->getCoinSerialNumbers();
-        size_t count = 0;
+        uint32_t count = 0;
         result.resize(serials.size() * 64);
 
         for (const auto& serial : serials) {