Index: uspace/lib/c/include/io/charfield.h
===================================================================
--- uspace/lib/c/include/io/charfield.h	(revision cf13b1787530fe212a0ac74399fd6d4b0f096731)
+++ uspace/lib/c/include/io/charfield.h	(revision f9c4bc5ad33eebd841769b0aac3e0c8e85867fb1)
@@ -38,4 +38,5 @@
 
 #include <stdbool.h>
+#include <wchar.h>
 #include <io/color.h>
 #include <io/style.h>