diff --git a/src/protocol/CompressionHandler.cpp b/src/protocol/CompressionHandler.cpp
index fb765fc..6ed5afd 100644
--- a/src/protocol/CompressionHandler.cpp
+++ b/src/protocol/CompressionHandler.cpp
@@ -15,7 +15,7 @@ bool CompressionHandler::compress(protocol::BasicPacket* packet, std::string &er
 	auto packet_payload = packet->data();
 	auto header_length = packet->length() - packet_payload.length();
 
-	size_t max_compressed_payload_size = max(min(packet_payload.length() * 2, packet_payload.length() + 400ULL), 24ULL); /* at least 12 bytes (QLZ header) */
+	size_t max_compressed_payload_size = max(min(packet_payload.length() * 2, (size_t) (packet_payload.length() + 400ULL)), (size_t) 24ULL); /* at least 12 bytes (QLZ header) */
 	auto target_buffer = buffer::allocate_buffer(max_compressed_payload_size + header_length);
 
 	qlz_state_compress state_compress{};