diff --git a/man7/pthreads.7 b/man7/pthreads.7
index 41f52902f..e0c335710 100644
--- a/man7/pthreads.7
+++ b/man7/pthreads.7
@@ -111,7 +111,8 @@ Over time, two threading implementations have been provided by
 the GNU C library on Linux:
 .IP \- 3
 .B LinuxThreads
-This is the original (now obsolete) Pthreads implementation.
+This is the original Pthreads implementation.
+Since glibc 2.4, this implementation is no longer supported.
 .IP \- 3
 .B NPTL
 (Native POSIX Threads Library)
@@ -119,7 +120,8 @@ This is the modern Pthreads implementation.
 By comparison with LinuxThreads, NPTL provides closer conformance to
 the requirements of the POSIX.1 specification and better performance
 when creating large numbers of threads.
-NPTL requires features that are present in the Linux 2.6 kernel.
+NPTL is available since glibc 2.3.2,
+and requires features that are present in the Linux 2.6 kernel.
 .PP
 Both of these are so-called 1:1 implementations, meaning that each
 thread maps to a kernel scheduling entity.
@@ -131,9 +133,6 @@ In NPTL, thread synchronization primitives (mutexes,
 thread joining, etc.) are implemented using the Linux
 .BR futex (2)
 system call.
-.PP
-Modern GNU C libraries provide both LinuxThreads and NPTL, with the
-latter being the default (if supported by the underlying kernel).
 .SS LinuxThreads
 The notable features of this implementation are the following:
 .IP \- 3
@@ -297,7 +296,7 @@ in the C shell).
 Since glibc 2.3.2, the
 .BR getconf (1)
 command can be used to determine
-the system's default threading implementation, for example:
+the system's threading implementation, for example:
 .nf
 .in +4
 
@@ -317,7 +316,8 @@ bash$ $( ldd /bin/ls | grep libc.so | awk '{print $3}' ) | \\
 .in -4
 .fi
 .SS "Selecting the Threading Implementation: LD_ASSUME_KERNEL"
-On systems with a glibc that supports both LinuxThreads and NPTL, the
+On systems with a glibc that supports both LinuxThreads and NPTL
+(i.e., glibc 2.3.\fIx\fP), the
 .B LD_ASSUME_KERNEL
 environment variable can be used to override
 the dynamic linker's default choice of threading implementation.