diff --git a/swaybar/input.c b/swaybar/input.c
index 31137f44..d0191f51 100644
--- a/swaybar/input.c
+++ b/swaybar/input.c
@@ -4,6 +4,7 @@
 #else
 #include <linux/input-event-codes.h>
 #endif
+#include <stdlib.h>
 #include <wayland-client.h>
 #include <wayland-cursor.h>
 #include <wlr/util/log.h>