1 files changed, 1 insertions, 1 deletions

diff --git a/coreutils/sort.c b/coreutils/sort.c
index c23bf9c60..c37810f1a 100644
--- a/coreutils/sort.c
+++ b/coreutils/sort.c
@@ -310,7 +310,7 @@ int sort_main(int argc, char **argv)
         /* Open input files and read data */
         for (i = argv[optind] ? optind : optind-1; argv[i]; i++) {
                 fp = stdin;
-                if (i >= optind && (argv[i][0] != '-' || argv[i][1]))
+                if (i >= optind && NOT_LONE_DASH(argv[i]))
                         fp = xfopen(argv[i], "r");
                 for (;;) {
                         line = GET_LINE(fp);