diff --git a/src/3rdParty/libE57Format/src/CheckedFile.cpp b/src/3rdParty/libE57Format/src/CheckedFile.cpp
index 3319d91dd3..2dc4143ccf 100644
--- a/src/3rdParty/libE57Format/src/CheckedFile.cpp
+++ b/src/3rdParty/libE57Format/src/CheckedFile.cpp
@@ -244,7 +244,7 @@ void CheckedFile::read( char *buf, size_t nRead, size_t /*bufSize*/ )
    std::vector<char> page_buffer_v( physicalPageSize );
    char *page_buffer = &page_buffer_v[0];
 
-   auto checksumMod = static_cast<const unsigned int>( std::nearbyint( 100.0 / checkSumPolicy_ ) );
+   const auto checksumMod = static_cast<unsigned int>( std::nearbyint( 100.0 / checkSumPolicy_ ) );
 
    while ( nRead > 0 )
    {
diff --git a/src/3rdParty/libE57Format/src/ImageFileImpl.cpp b/src/3rdParty/libE57Format/src/ImageFileImpl.cpp
index 6a9da7480f..15ed02a891 100644
--- a/src/3rdParty/libE57Format/src/ImageFileImpl.cpp
+++ b/src/3rdParty/libE57Format/src/ImageFileImpl.cpp
@@ -302,10 +302,10 @@ namespace e57
          file_->seek( xmlLogicalOffset_, CheckedFile::Logical );
          uint64_t xmlPhysicalOffset = file_->position( CheckedFile::Physical );
          *file_ << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
-#ifdef E57_OXYGEN_SUPPORT //???                                                             \
+#ifdef E57_OXYGEN_SUPPORT /*//???                                                             \
                           //???        *file_ << "<?oxygen                                  \
                           // RNGSchema=\"file:/C:/kevin/astm/DataFormat/xif/las_v0_05.rnc\" \
-                          // type=\"compact\"?>\n";
+                          // type=\"compact\"?>\n";*/
 #endif
 
          //??? need to add name space attributes to e57Root