diff --git a/cg/cg6902.cpp b/cg/cg6902.cpp
index 79d8230a8..d3efc1925 100755
--- a/cg/cg6902.cpp
+++ b/cg/cg6902.cpp
@@ -155,7 +155,7 @@ int TInv_cont::calcola_numero_dischi(TMask& msk,TString& floppy)
     _dim_disk = 16L*1024L*1024L;   // 16 mega
     for (; _dim_disk > 0; _dim_disk -= 1024L*1024L)
     {
-      if (os_test_disk_free_space("", _dim_disk))
+      if (xvt_fsys_test_disk_free_space("", _dim_disk))
         break;
     }
   }