diff --git a/cfg/posix.cfg b/cfg/posix.cfg
index 0a7a888ea..bccaece39 100644
--- a/cfg/posix.cfg
+++ b/cfg/posix.cfg
@@ -441,4 +441,7 @@
   <podtype name="in_addr_t" sign="u" size="4"/>
   <podtype name="socklen_t" sign="u" size="4"/>
   <podtype name="sa_family_t" sign="u" size="2"/>
+  <podtype name="pid_t" sign="s"/>
+  <podtype name="uid_t" sign="u"/>
+  <podtype name="gid_t" sign="u"/>
 </def>