diff --git a/Doc/lib/libstdtypes.tex b/Doc/lib/libstdtypes.tex
index fd58614..7ebdc63 100644
--- a/Doc/lib/libstdtypes.tex
+++ b/Doc/lib/libstdtypes.tex
@@ -1398,7 +1398,8 @@
 the dictionary as the value of \var{k}. \var{x} defaults to \var{None}.
 
 \item[(6)] \function{popitem()} is useful to destructively iterate
-over a dictionary, as often used in set algorithms.
+over a dictionary, as often used in set algorithms.  If the dictionary
+is empty, calling \function{popitem()} raises a \exception{KeyError}.
 
 \item[(7)] \function{fromkeys()} is a class method that returns a
 new dictionary. \var{value} defaults to \code{None}.  \versionadded{2.3}