diff --git a/cfg/posix.cfg b/cfg/posix.cfg
index 498c064d3..661454157 100644
--- a/cfg/posix.cfg
+++ b/cfg/posix.cfg
@@ -54,4 +54,8 @@
     <dealloc>pclose</dealloc>
     <alloc init="true">popen</alloc>
   </resource>
-</def>
+
+  <podtype name="in_port_t" sign="u" size="2"/>
+  <podtype name="in_addr_t" sign="s" size="4"/>
+ 
+ </def>