diff --git a/ompi/communicator/comm_init.c b/ompi/communicator/comm_init.c
index 9c1732c58d6..59b559ad450 100644
--- a/ompi/communicator/comm_init.c
+++ b/ompi/communicator/comm_init.c
@@ -242,7 +242,7 @@ ompi_communicator_t *ompi_comm_allocate ( int local_size, int remote_size )
 
     /* create new communicator element */
     new_comm = OBJ_NEW(ompi_communicator_t);
-    Tau_start_class_allocation(new_comm->c_base.obj_class->cls_name, 0, 0);
+    Tau_start_class_allocation(new_comm->super.s_base.obj_class->cls_name, 0, 0);
     new_comm->super.s_info = NULL;
     new_comm->c_local_group = ompi_group_allocate ( local_size );
     if ( 0 < remote_size ) {
@@ -259,7 +259,7 @@ ompi_communicator_t *ompi_comm_allocate ( int local_size, int remote_size )
 
     /* fill in the inscribing hyper-cube dimensions */
     new_comm->c_cube_dim = opal_cube_dim(local_size);
-    Tau_stop_class_allocation(new_comm->c_base.obj_class->cls_name, 0);
+    Tau_stop_class_allocation(new_comm->super.s_base.obj_class->cls_name, 0);
 
     return new_comm;
 }
diff --git a/ompi/win/win.c b/ompi/win/win.c
index 160b7147bd4..6f36c68ec56 100644
--- a/ompi/win/win.c
+++ b/ompi/win/win.c
@@ -148,7 +148,7 @@ static int alloc_window(struct ompi_communicator_t *comm, opal_info_t *info, int
 
     /* create the object */
     win = OBJ_NEW(ompi_win_t);
-    Tau_start_class_allocation(win->w_base.obj_class->cls_name, 0, 0);
+    Tau_start_class_allocation(win->super.s_base.obj_class->cls_name, 0, 0);
     if (NULL == win) {
         return OMPI_ERR_OUT_OF_RESOURCE;
     }
@@ -188,7 +188,7 @@ static int alloc_window(struct ompi_communicator_t *comm, opal_info_t *info, int
     }
 
     *win_out = win;
-    Tau_stop_class_allocation(win->w_base.obj_class->cls_name, 0);
+    Tau_stop_class_allocation(win->super.s_base.obj_class->cls_name, 0);
 
     return OMPI_SUCCESS;
 }