Index: kernel/generic/include/string.h
===================================================================
--- kernel/generic/include/string.h	(revision c8bf88d737f715dd3bf256ec6f8bf31e0d3be7e1)
+++ kernel/generic/include/string.h	(revision cee8d3e109ecfcf59fb15c03ff1c4a23c5e3ac81)
@@ -65,5 +65,5 @@
 
 extern wchar_t str_decode(const char *str, size_t *offset, size_t sz);
-extern int chr_encode(const wchar_t ch, char *str, size_t *offset, size_t sz);
+extern int chr_encode(wchar_t ch, char *str, size_t *offset, size_t sz);
 
 extern size_t str_size(const char *str);
@@ -79,6 +79,6 @@
 extern count_t wstr_nlength(const wchar_t *str, size_t size);
 
-extern bool ascii_check(const wchar_t ch);
-extern bool chr_check(const wchar_t ch);
+extern bool ascii_check(wchar_t ch);
+extern bool chr_check(wchar_t ch);
 
 extern int str_cmp(const char *s1, const char *s2);