3 files changed, 8 insertions, 6 deletions

diff --git a/miscutils/last.c b/miscutils/last.c
index f8c301395..6e3ed9093 100644
--- a/miscutils/last.c
+++ b/miscutils/last.c
@@ -35,7 +35,7 @@
 #endif
 
 int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int last_main(int argc, char **argv UNUSED_PARAM)
+int last_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
 {
         struct utmp ut;
         int n, file = STDIN_FILENO;
@@ -56,7 +56,7 @@ int last_main(int argc, char **argv UNUSED_PARAM)
                 TYPE_OLD_TIME   /* OLD_TIME, 4 */
         };
 
-        if (argc > 1) {
+        if (argv[1]) {
                 bb_show_usage();
         }
         file = xopen(bb_path_wtmp_file, O_RDONLY);
diff --git a/miscutils/readahead.c b/miscutils/readahead.c
index fb71ce85f..f3b21a2fc 100644
--- a/miscutils/readahead.c
+++ b/miscutils/readahead.c
@@ -13,11 +13,13 @@
 #include "libbb.h"
 
 int readahead_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int readahead_main(int argc, char **argv)
+int readahead_main(int argc UNUSED_PARAM, char **argv)
 {
         int retval = EXIT_SUCCESS;
 
-        if (argc == 1) bb_show_usage();
+        if (!argv[1]) {
+                bb_show_usage();
+        }
 
         while (*++argv) {
                 int fd = open_or_warn(*argv, O_RDONLY);
diff --git a/miscutils/ttysize.c b/miscutils/ttysize.c
index 05455543d..ca9a2ec8d 100644
--- a/miscutils/ttysize.c
+++ b/miscutils/ttysize.c
@@ -12,7 +12,7 @@
 #include "libbb.h"
 
 int ttysize_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int ttysize_main(int argc, char **argv)
+int ttysize_main(int argc UNUSED_PARAM, char **argv)
 {
         unsigned w, h;
         struct winsize wsz;
@@ -24,7 +24,7 @@ int ttysize_main(int argc, char **argv)
                 h = wsz.ws_row;
         }
 
-        if (argc == 1) {
+        if (!argv[1]) {
                 printf("%u %u", w, h);
         } else {
                 const char *fmt, *arg;