diff --git a/test/test.c b/test/test.c
index 310b74b..102201b 100644
--- a/test/test.c
+++ b/test/test.c
@@ -54,7 +54,7 @@ int test_file_compare (const char *path_a, const char *path_b)
if (fgets(buf_b, 1024, fp_b) == NULL) {
return 1;
}
- /* TODO: use memcmp */
+ /* TODO: use memcmp for NUL bytes */
if ((r = strcmp(buf_a, buf_b)))
return r;
}