diff --git a/projects/binutils/fuzz_readelf.c b/projects/binutils/fuzz_readelf.c
index df5060171..a222e0c09 100644
--- a/projects/binutils/fuzz_readelf.c
+++ b/projects/binutils/fuzz_readelf.c
@@ -47,8 +47,11 @@ LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 	unlink(filename);
 
 	free (dump_ctf_symtab_name);
+	dump_ctf_symtab_name = NULL;
 	free (dump_ctf_strtab_name);
+	dump_ctf_strtab_name = NULL;
 	free (dump_ctf_parent_name);
+	dump_ctf_parent_name = NULL;
 
 	return 0;
 }