Index: trunk/src_plugins/dialogs/dlg_library.c
===================================================================
--- trunk/src_plugins/dialogs/dlg_library.c	(revision 26555)
+++ trunk/src_plugins/dialogs/dlg_library.c	(revision 26556)
@@ -140,7 +140,9 @@
 	gds_t tmp;
 
 	if (ctx->sc != NULL) {
+		pcb_undo_freeze_add();
 		pcb_subc_remove(ctx->sc);
+		pcb_undo_unfreeze_add();
 		ctx->sc = NULL;
 	}