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 37e8c4a1c218e8d69819bd4f761fa694e0884dad)
@@ -38,4 +38,5 @@
 
 #include <stdbool.h>
+#include <wchar.h>
 #include <io/color.h>
 #include <io/style.h>