diff --git a/libc/kernel/tools/defaults.py b/libc/kernel/tools/defaults.py
index ac12fc7..e2426c6 100644
--- a/libc/kernel/tools/defaults.py
+++ b/libc/kernel/tools/defaults.py
@@ -43,6 +43,7 @@
     "in_addr": False,
     "ip_mreq_source": False,
     "ip_msfilter": False,
+    "tcphdr": False,
     "timespec": False,
     }