1 files changed, 2 insertions, 2 deletions

diff --git a/coreutils/md5_sha1_sum.c b/coreutils/md5_sha1_sum.c
index e8d3a1509..6fe1b0286 100644
--- a/coreutils/md5_sha1_sum.c
+++ b/coreutils/md5_sha1_sum.c
@@ -39,7 +39,7 @@ static uint8_t *hash_file(const char *filename, hash_algo_t hash_algo)
         void (*final)(void*, void*);
 
         src_fd = STDIN_FILENO;
-        if (filename[0] != '-' || filename[1]) { /* not "-" */
+        if (NOT_LONE_DASH(filename)) {
                 src_fd = open(filename, O_RDONLY);
                 if (src_fd < 0) {
                         bb_perror_msg("%s", filename);
@@ -120,7 +120,7 @@ int md5_sha1_sum_main(int argc, char **argv)
                 }
 
                 pre_computed_stream = stdin;
-                if (file_ptr[0] != '-' || file_ptr[1]) { /* not "-" */
+                if (NOT_LONE_DASH(file_ptr)) {
                         pre_computed_stream = xfopen(file_ptr, "r");
                 }