diff --git a/coding/csv_reader.hpp b/coding/csv_reader.hpp
index b10ebf1c1e..710e631179 100644
--- a/coding/csv_reader.hpp
+++ b/coding/csv_reader.hpp
@@ -35,7 +35,7 @@ public:
   template <typename Callback>
   void Read(Reader const & reader, Callback const & fn, Params const & params = {}) const
   {
-    std::string str(reader.Size(), '\0');
+    std::string str(static_cast<size_t>(reader.Size()), '\0');
     reader.Read(0, &str[0], reader.Size());
     std::istringstream stream(str);
     Read(stream, fn, params);
diff --git a/indexer/ftraits.hpp b/indexer/ftraits.hpp
index 1348d2f282..154c48e2f8 100644
--- a/indexer/ftraits.hpp
+++ b/indexer/ftraits.hpp
@@ -50,7 +50,7 @@ using UGCRatingCategories = std::vector<std::string>;
 
 struct UGCItem
 {
-  UGCItem() = default;
+  UGCItem() {}
   UGCItem(UGCTypeMask m, UGCRatingCategories && c)
     : m_mask(m), m_categories(std::move(c))
   {
diff --git a/ugc/storage.cpp b/ugc/storage.cpp
index 171af6095c..e3fd2a54b0 100644
--- a/ugc/storage.cpp
+++ b/ugc/storage.cpp
@@ -93,7 +93,7 @@ UGCUpdate Storage::GetUGCUpdate(FeatureID const & id) const
     return {};
 
   auto const offset = index->m_offset;
-  auto const size = UGCSizeAtIndex(distance(m_UGCIndexes.begin(), index));
+  auto const size = static_cast<size_t>(UGCSizeAtIndex(distance(m_UGCIndexes.begin(), index)));
   vector<uint8_t> buf;
   buf.resize(size);
   auto const ugcFilePath = GetUGCFilePath();
@@ -222,7 +222,7 @@ void Storage::Defragmentation()
         continue;
 
       auto const offset = index.m_offset;
-      auto const size = UGCSizeAtIndex(i);
+      auto const size = static_cast<size_t>(UGCSizeAtIndex(i));
       vector<uint8_t> buf;
       buf.resize(size);
       r.Read(offset, buf.data(), size);
@@ -269,7 +269,7 @@ string Storage::GetUGCToSend() const
       continue;
 
     auto const offset = index.m_offset;
-    auto const bufSize = UGCSizeAtIndex(i);
+    auto const bufSize = static_cast<size_t>(UGCSizeAtIndex(i));
     buf.resize(bufSize);
     try
     {