diff --git a/GNUmakefile b/GNUmakefile
index f53c2dad481d281586a3ec1e2b901349cf3bb2bd..3fea8546b4dfdec2e209f5958bba78e0e04aa717 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -196,5 +196,5 @@ frontend-sqlite: $(FEDIR)/GenericIOSQLite.so $(FEDIR)/sqlite3
 fe-sqlite: frontend-sqlite
 
 clean:
-	rm -rf frontend mpi
+	rm -rf frontend mpi python/genericio.pyc