diff --git a/CMakeLists.txt b/CMakeLists.txt
index 21c74cc22..c64ec1113 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -29,8 +29,9 @@ STRING(TOUPPER ${PROJECT_NAME} PROJECT_NAME_UC)
 if (DEFINED EMSCRIPTEN)
   list(APPEND CMAKE_FIND_ROOT_PATH "/")
   message("Using Emscripten")
-  add_compile_options("-sUSE_BOOST_HEADERS=1" "-pthread")
-  add_link_options("-pthread")
+  add_compile_options(-sUSE_BOOST_HEADERS=1 -pthread)
+  add_link_options(-sUSE_BOOST_HEADERS=1 -pthread)
+  add_compile_definitions(__EMSCRIPTEN__)
 else()
   message("Not using Emscripten")
 endif()
diff --git a/src/SMESH_I/CMakeLists.txt b/src/SMESH_I/CMakeLists.txt
index a9788ca89..03b4a2b16 100644
--- a/src/SMESH_I/CMakeLists.txt
+++ b/src/SMESH_I/CMakeLists.txt
@@ -127,7 +127,7 @@ SET(SMESHEngine_SOURCES
   SMESH_Gen_i_1.cxx
   SMESH_Gen_No_Session_i.cxx
   SMESH_Gen_Session_i.cxx
-  SMESH_PythonDump.cxx
+  # SMESH_PythonDump.cxx # EMscripten: duplicate symbol
   SMESH_Mesh_i.cxx
   SMESH_subMesh_i.cxx
   SMESH_MeshEditor_i.cxx
diff --git a/src/SMESH_I/SMESH_Gen_i.cxx b/src/SMESH_I/SMESH_Gen_i.cxx
index 94109451a..3472035ee 100644
--- a/src/SMESH_I/SMESH_Gen_i.cxx
+++ b/src/SMESH_I/SMESH_Gen_i.cxx
@@ -153,9 +153,9 @@
 #include <cstdlib>
 #include <memory>
 
-#include <boost/archive/text_oarchive.hpp>
-#include <boost/serialization/list.hpp>
-#include <boost/serialization/string.hpp>
+// #include <boost/archive/text_oarchive.hpp>
+// #include <boost/serialization/list.hpp>
+// #include <boost/serialization/string.hpp>
 #include <boost/filesystem.hpp>
 
 namespace fs = boost::filesystem;
@@ -4966,7 +4966,7 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
               }
               // convert orderEntryLists to string
               std::ostringstream ostream;
-              boost::archive::text_oarchive( ostream ) << orderEntryLists;
+              // boost::archive::text_oarchive( ostream ) << orderEntryLists;
               std::string orderEntryString = ostream.str();
 
               // write HDF group
@@ -6153,7 +6153,7 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
         aDataset->CloseOnDisk();
 
         std::list< std::list< std::string > > orderEntryLists;
-        SMESHUtils::BoostTxtArchive( dataString ) >> orderEntryLists;
+        // SMESHUtils::BoostTxtArchive( dataString ) >> orderEntryLists;
 
         TListOfListOfInt anOrderIds;
         for ( const std::list< std::string >& entryList : orderEntryLists )