diff --git a/Doc/lib/libpdb.tex b/Doc/lib/libpdb.tex
index 81dc1e2..6301175 100644
--- a/Doc/lib/libpdb.tex
+++ b/Doc/lib/libpdb.tex
@@ -42,6 +42,13 @@
 python -m pdb myscript.py
 \end{verbatim}
 
+When invoked as a script, pdb will automatically enter post-mortem debugging
+if the program being debugged exits abnormally. After post-mortem debugging
+(or after normal exit of the program), pdb will restart the program.
+Automatic restarting preserves pdb's state (such as breakpoints) and in most
+cases is more useful than quitting the debugger upon program's exit.
+\versionadded[Restarting post-mortem behavior added]{2.4}
+
 Typical usage to inspect a crashed program is:
 
 \begin{verbatim}