diff --git a/include/cxx/cstdlib b/include/cxx/cstdlib
index 0654cc8bec4..ba2add725b7 100644
--- a/include/cxx/cstdlib
+++ b/include/cxx/cstdlib
@@ -70,6 +70,9 @@ namespace std
 
   // String to binary conversions
 
+  using ::atof;
+  using ::atoi;
+  using ::atol;
   using ::strtol;
   using ::strtoul;
 #ifdef CONFIG_HAVE_LONG_LONG