diff --git a/test/Makefile b/test/Makefile
index 042b869..855f938 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -87,4 +87,4 @@ selftest_short.c:
 	./mk_test.py -s 10 12 14 > selftest_short.c
 
 clean:
-	rm -f *~ bm_* st_* tr_* kf_* tkfc_* ff_* *.pyc *.pyo
+	rm -f *~ bm_* st_* tr_* kf_* tkfc_* ff_* ffr_* *.pyc *.pyo
diff --git a/tools/Makefile b/tools/Makefile
index 042b869..855f938 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -87,4 +87,4 @@ selftest_short.c:
 	./mk_test.py -s 10 12 14 > selftest_short.c
 
 clean:
-	rm -f *~ bm_* st_* tr_* kf_* tkfc_* ff_* *.pyc *.pyo
+	rm -f *~ bm_* st_* tr_* kf_* tkfc_* ff_* ffr_* *.pyc *.pyo