diff --git a/gtk/a11y/gtktextviewaccessible.c b/gtk/a11y/gtktextviewaccessible.c
index 809a5a929e..d0fa153c42 100644
--- a/gtk/a11y/gtktextviewaccessible.c
+++ b/gtk/a11y/gtktextviewaccessible.c
@@ -20,7 +20,11 @@
 #include "config.h"
 
 #include <sys/types.h>
+
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
+
 #include <string.h>
 #include <stdlib.h>
 #include <glib-object.h>