diff --git a/libs/libc/libc.csv b/libs/libc/libc.csv
index e7ef27f4c43..ea72c080c40 100644
--- a/libs/libc/libc.csv
+++ b/libs/libc/libc.csv
@@ -234,4 +234,5 @@
 "wmemcpy","wchar.h","defined(CONFIG_LIBC_WCHAR)","wchat_t *","wchar_t *","wchar_t *","size_t"
 "wmemmove","wchar.h","defined(CONFIG_LIBC_WCHAR)","wchat_t *","wchar_t *","wchar_t *","size_t"
 "wmemset","wchar.h","defined(CONFIG_LIBC_WCHAR)","wchat_t *","wchar_t *","wchar_t","size_t"
+"writev","sys/uio.h","","ssize_t","int","FAR const struct iovec *","int"
 "_warn","debug.h","!defined(CONFIG_CPP_HAVE_VARARGS) && defined(CONFIG_DEBUG_WARN)","int","FAR const char *","..."
diff --git a/libs/libc/math.csv b/libs/libc/math.csv
index 221288d8ea2..4a6fbb490da 100644
--- a/libs/libc/math.csv
+++ b/libs/libc/math.csv
@@ -76,4 +76,3 @@
 "tanhf","math.h","defined(CONFIG_LIBM) || defined(CONFIG_ARCH_MATH)","float","float"
 "tanhl","math.h","defined(CONFIG_HAVE_LONG_DOUBLE) && (defined(CONFIG_LIBM) || defined(CONFIG_ARCH_MATH))","long double","long double"
 "tanl","math.h","defined(CONFIG_HAVE_LONG_DOUBLE) && (defined(CONFIG_LIBM) || defined(CONFIG_ARCH_MATH))","long double","long double"
-"writev","sys/uio.h","","ssize_t","int","FAR const struct iovec *","int"