diff --git a/src/3rdParty/salomesmesh/src/SMESH/DriverGMF.cpp b/src/3rdParty/salomesmesh/src/SMESH/DriverGMF.cpp
index d72ff2363f..f108cbbcb2 100644
--- a/src/3rdParty/salomesmesh/src/SMESH/DriverGMF.cpp
+++ b/src/3rdParty/salomesmesh/src/SMESH/DriverGMF.cpp
@@ -55,7 +55,7 @@ namespace DriverGMF
 
   bool isExtensionCorrect( const std::string& fileName )
   {
-    std::string ext  = boost::filesystem::extension(fileName);
+    std::string ext = boost::filesystem::path(fileName).extension().string();
     switch ( ext.size() ) {
     case 5: return ( ext == ".mesh" || ext == ".solb" );
     case 6: return ( ext == ".meshb" );