1 files changed, 6 insertions, 0 deletions

diff --git a/uisimulator/x11/io.c b/uisimulator/x11/io.c
index 6a19dd07b1..6210e6d927 100644
--- a/uisimulator/x11/io.c
+++ b/uisimulator/x11/io.c
@@ -23,6 +23,7 @@
 #include <sys/stat.h>
 #include <sys/vfs.h>
 #include <dirent.h>
+#include <unistd.h>
 
 #include <fcntl.h>
 #include "debug.h"
@@ -109,6 +110,11 @@ int x11_open(char *name, int opts)
   return open(name, opts);
 }
 
+int x11_close(int fd)
+{
+  return close(fd);
+}
+
 int x11_creat(char *name, int mode)
 {
   char buffer[256]; /* sufficiently big */