diff --git a/glfw/ibus_glfw.c b/glfw/ibus_glfw.c
index d42dc55e1..e068bec9e 100644
--- a/glfw/ibus_glfw.c
+++ b/glfw/ibus_glfw.c
@@ -28,6 +28,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
+#include <limits.h>
 
 #include "internal.h"
 #include "ibus_glfw.h"
diff --git a/glfw/x11_init.c b/glfw/x11_init.c
index 39cea0736..decc2f4d6 100644
--- a/glfw/x11_init.c
+++ b/glfw/x11_init.c
@@ -37,6 +37,7 @@
 #include <stdio.h>
 #include <locale.h>
 #include <fcntl.h>
+#include <unistd.h>
 
 
 // Check whether the specified atom is supported