diff --git a/linux/esptun.c b/linux/esptun.c
index b23c6d9..7327714 100644
--- a/linux/esptun.c
+++ b/linux/esptun.c
@@ -540,7 +540,7 @@ int main(int argc, char **argv)
             fds[i].revents = 0;
         }
 
-        if (poll(fds, 2, 0) < 0) {
+        if (poll(fds, 2, -1) < 0) {
             perror("poll");
             exit(1);
         }
diff --git a/linux/term.c b/linux/term.c
index 636f92e..0aa8f82 100644
--- a/linux/term.c
+++ b/linux/term.c
@@ -92,7 +92,7 @@ int main(int argc, char **argv) {
             fds[i].revents = 0;
         }
 
-        if (poll(fds, 2, 0) < 0) {
+        if (poll(fds, 2, -1) < 0) {
             fprintf(stderr, "Poll error: %s\n", strerror(errno));
             exit(1);
         }