diff --git a/man7/pthreads.7 b/man7/pthreads.7
index f2d2e7228..02ad57a50 100644
--- a/man7/pthreads.7
+++ b/man7/pthreads.7
@@ -273,6 +273,22 @@ However, a new thread's alternate signal stack settings
 are copied from the thread that created it, so that
 the threads initially share an alternate signal stack
 (fixed in kernel 2.6.16).
+.PP
+Note the following further points about the NPTL implementation:
+.IP \- 3
+If the stack size soft resource limit (see the description of
+.B RLIMIT_STACK 
+in
+.BR setrlimit (2))
+is set to a value other than
+.IR unlimited ,
+then this value defines the default stack size for new threads.
+To be effective, this limit must be set before the program
+is executed, perhaps using the
+.I ulimit -s
+shell built-in command 
+.RI ( "limit stacksize"
+in the C shell).
 .SS "Determining the Threading Implementation"
 Since glibc 2.3.2, the
 .BR getconf (1)