diff --git a/NEWS b/NEWS
index 662b3a908..ccae5f7d0 100644
--- a/NEWS
+++ b/NEWS
@@ -8,6 +8,13 @@ Please send Guile bug reports to bug-guile@gnu.org.
 (During the 1.9 series, we will keep an incremental NEWS for the latest
 prerelease, and a full NEWS corresponding to 1.8 -> 2.0.)
 
+Changes in 1.9.7 (since the 1.9.6 prerelease):
+
+** New primitive `getsid'
+
+Scheme binding for the `getsid' C library call.
+
+
 Changes in 1.9.6 (since the 1.9.5 prerelease):
 
 ** New implementation of `primitive-eval'
diff --git a/doc/ref/posix.texi b/doc/ref/posix.texi
index fbe30598c..287045983 100644
--- a/doc/ref/posix.texi
+++ b/doc/ref/posix.texi
@@ -1596,6 +1596,12 @@ from its controlling terminal if it has one.
 The return value is an integer representing the new process group ID.
 @end deffn
 
+@deffn {Scheme Procedure} getsid pid
+@deffnx {C Function} scm_getsid (pid)
+Returns the session ID of process @var{pid}.  (The session
+ID of a process is the process group ID of its session leader.)
+@end deffn
+
 @deffn {Scheme Procedure} waitpid pid [options]
 @deffnx {C Function} scm_waitpid (pid, options)
 This procedure collects status information from a child process which