diff --git a/libs/libc/libc.csv b/libs/libc/libc.csv
index c164c910f9..5f8e13a112 100644
--- a/libs/libc/libc.csv
+++ b/libs/libc/libc.csv
@@ -215,12 +215,14 @@
 "strspn","string.h","","size_t","FAR const char *","FAR const char *"
 "strstr","string.h","","FAR char","FAR const char *","FAR const char *"
 "strtod","stdlib.h","defined(CONFIG_HAVE_DOUBLE)","double","FAR const char *","FAR char **"
+"strtoimax","inttypes.h","","intmax_t","FAR const char *","FAR char **","int"
 "strtok","string.h","","FAR char *","FAR char *","FAR const char *"
 "strtok_r","string.h","","FAR char *","FAR char *","FAR const char *","FAR char **"
 "strtol","stdlib.h","","long","FAR const char *","FAR char **","int"
 "strtoll","stdlib.h","defined(CONFIG_HAVE_LONG_LONG)","long long","FAR const char *nptr","FAR char **endptr","int base"
 "strtoul","stdlib.h","","unsigned long","FAR const char *","FAR char **","int"
 "strtoull","stdlib.h","defined(CONFIG_HAVE_LONG_LONG)","unsigned long long","FAR const char *","FAR char **","int"
+"strtoumax","inttypes.h","","uintmax_t","FAR const char *","FAR char **","int"
 "strxfrm","string.h","defined(CONFIG_LIBC_LOCALE)","size_t","FAR char *","FAR const char *","size_t"
 "swab","unistd.h","","void","FAR const void *","FAR void *","ssize_t"
 "swprintf","wchar.h","defined(CONFIG_LIBC_WCHAR)","int","FAR wchar_t *","size_t","FAR const wchar_t *","..."