https://github.com/davatorium/rofi/commit/c896cbbca4b05ec368667396032450e0cf21e26b

Index: source/rofi.c
--- source/rofi.c.orig
+++ source/rofi.c
@@ -41,6 +41,7 @@
 #include <time.h>
 #include <unistd.h>
 #include <xcb/xcb.h>
+#include <sys/stat.h>	/* S_IWUSR */
 
 #include <glib-unix.h>