--- Libc/Libc-391/pthreads/pthread.3
+++ Libc/Libc-320/pthreads/pthread.3
@@ -107,12 +107,6 @@
 .Fn pthread_self void
 .Xc
 Returns the thread ID of the calling thread.
-.It Xo
-.Ft int 
-.Fn pthread_atfork "void (*prepare)(void)" "void (*parent)(void)" "void (*child)(void)"
-.Xc
-Registers handlers to be called before and after
-.Fn fork
 .El
 .Sh ATTRIBUTE OBJECT ROUTINES
 .Bl -tag -width Er