--- htk_3.4.1/HTKLib/HAdapt.c	2009-03-12 18:41:39.000000000 +0000
+++ htk_3.4.2/HTKLib/HAdapt.c	2009-11-22 15:20:53.083000000 +0000
@@ -3715,6 +3718,7 @@
     }
     Dispose(&gstack,accs);
   }
+  FreeIntVec(&gstack,classes);
   return TRUE;
 }