diff --git a/modules/mol/alg/src/ldt.cc b/modules/mol/alg/src/ldt.cc
index 822b4389805b9d27a4b204eeb3222d95f78e0a9c..5dbab61cfceb3d77794dbf465447980cdfa32e54 100644
--- a/modules/mol/alg/src/ldt.cc
+++ b/modules/mol/alg/src/ldt.cc
@@ -234,7 +234,13 @@ int main (int argc, char **argv)
     EntityView model2=model.Select("aname!=CEN,NV,OT1,OT,CAY,CY,OXT,1OCT,NT,OT2,2OCT,OVL1,OC1,O1,OC2,O2,OVU1");
     EntityView v1=model2.Select("not (rname==GLY and aname==CB)");
     boost::filesystem::path pathstring(files[i]);
+    
+    #if BOOST_FILESYSTEM_VERSION==3
     String filestring=pathstring.filename().string();
+    #else
+    String filestring=pathstring.file_string();
+    #endif      
+    
     if (filestring.substr(5,5)=="TS257" || filestring.substr(5,5)=="TS458" ) {
       for (AtomHandleIter ait=v1.GetHandle().AtomsBegin();ait!=v1.GetHandle().AtomsEnd();++ait){
         AtomHandle aitv = *ait;