diff --git a/ethercat.c b/ethercat.c
index c15c1d6..621789b 100644
--- a/ethercat.c
+++ b/ethercat.c
@@ -39,7 +39,7 @@ ssize_t write_size;
 // 1 stdin
 struct pollfd polls_pls[NUMBER_OF_POLLED_FILES];
 
-void stop() {
+void stop([[maybe_unused]] int ignored) {
   stop_now = true;
 }