diff --git a/fuzzers/011-ffconfig/Makefile b/fuzzers/011-ffconfig/Makefile
index 1a7faa6e..cf669fbf 100644
--- a/fuzzers/011-ffconfig/Makefile
+++ b/fuzzers/011-ffconfig/Makefile
@@ -22,7 +22,8 @@ run:
 	touch run.ok
 
 clean:
-	rm -rf specimen_[0-9][0-9][0-9]/ seg_clblx.segbits vivado*.log vivado_*.str vivado*.jou design *.bits *.dcp *.bit top.v run.ok
+	rm -rf specimen_[0-9][0-9][0-9]/ seg_clblx.segbits __pycache__ run.ok
+	rm -rf vivado*.log vivado_*.str vivado*.jou design *.bits *.dcp *.bit top.v
 
 .PHONY: database pushdb run clean