diff --git a/src/STEPCAFControl/STEPCAFControl_Reader.cxx b/src/STEPCAFControl/STEPCAFControl_Reader.cxx
index f7204a75a7..c21b55e5e2 100755
--- a/src/STEPCAFControl/STEPCAFControl_Reader.cxx
+++ b/src/STEPCAFControl/STEPCAFControl_Reader.cxx
@@ -428,7 +428,7 @@ Standard_Boolean STEPCAFControl_Reader::Transfer (STEPControl_Reader &reader,
   if ( num <=0 ) return Standard_False;
   if ( nroot ) {
     if ( nroot > num ) return Standard_False;
-    reader.TransferOneRoot ( num );
+    reader.TransferOneRoot ( nroot );
   }
   else {
     for ( i=1; i <= num; i++ ) reader.TransferOneRoot ( i );