--- scanelf.c
+++ scanelf.c
@@ -1223,7 +1223,7 @@ static int scanelf_from_file(char *filen
 	char *p;
 	char path[__PAX_UTILS_PATH_MAX];
 
-	if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL))
+	if (strcmp(filename, "-") == 0)
 		fp = stdin;
 	else if ((fp = fopen(filename, "r")) == NULL)
 		return 1;
@@ -1653,6 +1653,8 @@ static void parseargs(int argc, char *ar
 		load_ld_so_conf(0, "/etc/ld.so.conf");
 	if (scan_ldpath) scanelf_ldpath();
 	if (scan_envpath) scanelf_envpath();
+	if (!from_file && ttyname(0) == NULL)
+		from_file = "-";
 	if (from_file) {
 		scanelf_from_file(from_file);
 		from_file = *argv;