diff --git a/src/misc.cpp b/src/misc.cpp
index 065dad99fa..ee82be1c70 100644
--- a/src/misc.cpp
+++ b/src/misc.cpp
@@ -74,7 +74,7 @@ void InitializeOldNames();
 std::string GenerateUid(std::string_view subject)
 {
 	extern void NetworkRandomBytesWithFallback(void *buf, size_t n);
-	extern std::string BytesToHexString(const byte *data, uint length);
+	extern std::string BytesToHexString(const byte *data, size_t length);
 
 	uint8 random_bytes[32];
 	NetworkRandomBytesWithFallback(random_bytes, lengthof(random_bytes));
diff --git a/src/network/network.cpp b/src/network/network.cpp
index bd5f92f704..24d851855e 100644
--- a/src/network/network.cpp
+++ b/src/network/network.cpp
@@ -1299,7 +1299,7 @@ static void NetworkGenerateServerId()
 	_settings_client.network.network_id = GenerateUid("OpenTTD Server ID");
 }
 
-std::string BytesToHexString(const byte *data, uint length)
+std::string BytesToHexString(const byte *data, size_t length)
 {
 	std::string hex_output;
 	hex_output.resize(length * 2);
diff --git a/src/network/network_internal.h b/src/network/network_internal.h
index f41a97f529..59d03baf74 100644
--- a/src/network/network_internal.h
+++ b/src/network/network_internal.h
@@ -162,7 +162,7 @@ StringID GetNetworkErrorMsg(NetworkErrorCode err);
 bool NetworkMakeClientNameUnique(std::string &new_name);
 std::string GenerateCompanyPasswordHash(const std::string &password, const std::string &password_server_id, uint32 password_game_seed);
 std::vector<uint8> GenerateGeneralPasswordHash(const std::string &password, const std::string &password_server_id, uint64 password_game_seed);
-std::string BytesToHexString(const byte *data, uint length);
+std::string BytesToHexString(const byte *data, size_t length);
 std::string NetworkGenerateRandomKeyString(uint bytes);
 
 std::string_view ParseCompanyFromConnectionString(const std::string &connection_string, CompanyID *company_id);