1 files changed, 1 insertions, 1 deletions

diff --git a/libbb/wfopen_input.c b/libbb/wfopen_input.c
index 3da855fe6..7a11dacd7 100644
--- a/libbb/wfopen_input.c
+++ b/libbb/wfopen_input.c
@@ -22,7 +22,7 @@ FILE *fopen_or_warn_stdin(const char *filename)
 
         if (filename != bb_msg_standard_input
          && filename[0]
-         && (filename[0] != '-' || filename[1])
+         && NOT_LONE_DASH(filename)
         ) {
                 fp = fopen_or_warn(filename, "r");
         }