diff --git a/libc/libc.csv b/libc/libc.csv
index c1fd9e575b9..fbeb3d9e161 100644
--- a/libc/libc.csv
+++ b/libc/libc.csv
@@ -80,9 +80,9 @@
 "lio_listio","aio.h","defined(CONFIG_FS_AIO)","int","int","FAR struct aiocb *const []|FAR struct aiocb *const *","int","FAR struct sigevent *"
 "llabs","stdlib.h","defined(CONFIG_HAVE_LONG_LONG)","long long int","long long int"
 "match","nuttx/lib/regex.h","","int","FAR const char *","FAR const char *"
-"mbrtowc","wchar.h",""defined(CONFIG_LIBC_WCHAR)","size_t","wchar_t *","FAR const char *","size_t","mbstate_t *"
-"mbsnrtowcs,"wchar.h","","size_t","FAR wchar_t *","FAR const char **","size_t","size_t","mbstate_t *"
-"mbtowc","wchar.h",""defined(CONFIG_LIBC_WCHAR)","int","wchar_t *","FAR const wchar_t *","size_t"
+"mbrtowc","wchar.h","defined(CONFIG_LIBC_WCHAR)","size_t","wchar_t *","FAR const char *","size_t","mbstate_t *"
+"mbsnrtowcs","wchar.h","","size_t","FAR wchar_t *","FAR const char **","size_t","size_t","mbstate_t *"
+"mbtowc","wchar.h","defined(CONFIG_LIBC_WCHAR)","int","wchar_t *","FAR const wchar_t *","size_t"
 "memccpy","string.h","","FAR void","FAR void *","FAR const void *","int c","size_t"
 "memchr","string.h","","FAR void","FAR const void *","int c","size_t"
 "memcmp","string.h","","int","FAR const void *","FAR const void *","size_t"