diff --git a/src/libs/core/impl/FileResourceHandler.cpp b/src/libs/core/impl/FileResourceHandler.cpp
index 2f555a4a..fd23bdd0 100644
--- a/src/libs/core/impl/FileResourceHandler.cpp
+++ b/src/libs/core/impl/FileResourceHandler.cpp
@@ -101,7 +101,7 @@ namespace lms::core
         } // end initial response setup
 
         ::uint64_t restSize = _beyondLastByte - _offset;
-        ::uint64_t pieceSize = std::min(restSize, _chunkSize);
+        ::uint64_t pieceSize = std::min(restSize, static_cast<::uint64_t>(_chunkSize));
 
         std::vector<char> buf(pieceSize);