diff --git a/sessions.h b/sessions.h
index 63908cf..1916cfa 100644
--- a/sessions.h
+++ b/sessions.h
@@ -83,6 +83,9 @@ void setsession(int pid, int ts_ttl, int ruid) {
         return;
 
 #ifdef TIOCSETVERAUTH
+    (void)pid;
+    (void)ruid;
+
     int ttyfd = open("/dev/tty", O_RDWR);
     ioctl(ttyfd, TIOCSETVERAUTH, &ts_ttl);
     close(ttyfd);
@@ -122,6 +125,9 @@ int getsession(int pid, int ts_ttl, int ruid) {
         return -1;
 
 #ifdef TIOCCHKVERAUTH
+    (void)pid;
+    (void)ruid;
+
     int ttyfd = open("/dev/tty", O_RDWR);
     int ret = ioctl(ttyfd, TIOCCHKVERAUTH);
     close(ttyfd);