diff --git a/src/SMESHUtils/SMESH_MGLicenseKeyGen.cxx b/src/SMESHUtils/SMESH_MGLicenseKeyGen.cxx
index ec06d9885..b058e86a2 100644
--- a/src/SMESHUtils/SMESH_MGLicenseKeyGen.cxx
+++ b/src/SMESHUtils/SMESH_MGLicenseKeyGen.cxx
@@ -29,10 +29,10 @@
 #include <Basics_DirUtils.hxx>
 #include <Basics_Utils.hxx>
 
-#include <regex>
 #include <cstdlib> // getenv, system
 
 #include <boost/filesystem.hpp>
+#include <boost/regex.hpp>
 namespace boofs = boost::filesystem;
 
 #ifdef WIN32
@@ -203,12 +203,12 @@ namespace
   {
     {// round1
       enum { SCHEME = 2, AUTHORITY = 4, PATH = 5 }; // sub-strings
-      std::regex urlRegex ( R"(^(([^:\/?#]+):)?(//([^\/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?)",
-                            std::regex::extended );
-      std::smatch matchResult;
+      boost::regex urlRegex ( R"(^(([^:\/?#]+):)?(//([^\/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?)",
+                              boost::regex::extended );
+      boost::smatch matchResult;
 
       libraryFile._isURL = false;
-      if ( std::regex_match( libraryFile._name, matchResult, urlRegex ))
+      if ( boost::regex_match( libraryFile._name, matchResult, urlRegex ))
         libraryFile._isURL = ( !matchResult.str( SCHEME    ).empty() &&
                               !matchResult.str( AUTHORITY ).empty() &&
                               !matchResult.str( PATH      ).empty() );
@@ -217,12 +217,12 @@ namespace
       return true;
     {// round2
       enum { HOST = 2, PORT = 3, PATH = 4 }; // sub-strings
-      std::regex urlRegex ( R"(^(([^:\/?#]+):)?([^/]+)?(/[^#]*))",
-                            std::regex::extended );
-      std::smatch matchResult;
+      boost::regex urlRegex ( R"(^(([^:\/?#]+):)?([^/]+)?(/[^#]*))",
+                              boost::regex::extended );
+      boost::smatch matchResult;
 
       libraryFile._isURL = false;
-      if ( std::regex_match( libraryFile._name, matchResult, urlRegex ))
+      if ( boost::regex_match( libraryFile._name, matchResult, urlRegex ))
         libraryFile._isURL = ( !matchResult.str( HOST ).empty() &&
                               !matchResult.str( PORT ).empty() &&
                               !matchResult.str( PATH ).empty() );