diff --git a/HACKING b/HACKING
index 471cf1d..0a941fc 100644
--- a/HACKING
+++ b/HACKING
@@ -69,10 +69,6 @@ it points to, or it is aliased to another pointer that is.
 2.3. Typedefs
 Typedefs are used to eliminate the redundant 'struct' keyword.
 
-2.4. Reserved namespaces in C and POSIX
-Underscore capital, double underscore, and underscore 't' suffixes should be
-avoided.
-
 3. Low level memory management
 
 Use of the malloc/free/realloc/calloc/valloc/memalign/posix_memalign