diff --git a/src/egl/main/egldisplay.c b/src/egl/main/egldisplay.c
index f09b2e96403..acb0405822f 100644
--- a/src/egl/main/egldisplay.c
+++ b/src/egl/main/egldisplay.c
@@ -35,6 +35,7 @@
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 #include <fcntl.h>
 #include "c11/threads.h"
 #include "util/u_atomic.h"