diff --git a/fuzzers/005-tilegrid/generate.sh b/fuzzers/005-tilegrid/generate.sh
old mode 100755
new mode 100644
diff --git a/fuzzers/070-tileconn/generate.sh b/fuzzers/070-tileconn/generate.sh
old mode 100755
new mode 100644
diff --git a/fuzzers/071-ppips/generate.sh b/fuzzers/071-ppips/generate.sh
old mode 100755
new mode 100644
diff --git a/fuzzers/Makefile b/fuzzers/Makefile
index 8ce11142..48e0ad0a 100644
--- a/fuzzers/Makefile
+++ b/fuzzers/Makefile
@@ -1,5 +1,7 @@
 define fuzzer
 all:: $(1)/run.ok
+clean::
+	$(MAKE) -C $(1) clean
 $(1)/run.ok: $(addsuffix /run.ok,$(2))
 	$(MAKE) -C $(1) run
 endef