diff --git a/window.c b/window.c
index 0ee6756e..44927138 100644
--- a/window.c
+++ b/window.c
@@ -28,6 +28,7 @@
 #include <string.h>
 #include <termios.h>
 #include <unistd.h>
+#include <time.h>
 
 #include "tmux.h"