1 files changed, 2 insertions, 0 deletions
diff --git a/nuttx/include/cxx/cstring b/nuttx/include/cxx/cstring
index 664aa97de..29a3bb043 100755
--- a/nuttx/include/cxx/cstring
+++ b/nuttx/include/cxx/cstring
@@ -52,8 +52,10 @@ namespace std
   using ::size_t;
   using ::strchr;
   using ::strdup;
+  using ::strndup;
   using ::strerror;
   using ::strlen;
+  using ::strnlen;
   using ::strcat;
   using ::strncat;
   using ::strcmp;