diff --git a/Doc/lib/libbase64.tex b/Doc/lib/libbase64.tex
index ab00ded..edd1920 100644
--- a/Doc/lib/libbase64.tex
+++ b/Doc/lib/libbase64.tex
@@ -13,6 +13,8 @@
 \indexii{RFC}{1421}
 \index{MIME, base 64 encoding}
 
+\renewcommand{\indexsubitem}{(in module base64)}
+
 \begin{funcdesc}{decode}{input\, output}
 Decode the contents of the \var{input} file and write the resulting
 binary data to the \var{output} file.
diff --git a/Doc/lib/libfnmatch.tex b/Doc/lib/libfnmatch.tex
index 86c9073..8bce50a 100644
--- a/Doc/lib/libfnmatch.tex
+++ b/Doc/lib/libfnmatch.tex
@@ -17,6 +17,8 @@
 special to this module.  See module \code{glob} for pathname expansion
 (\code{glob} uses \code{fnmatch} to match filename segments).
 
+\renewcommand{\indexsubitem}{(in module fnmatch)}
+
 \begin{funcdesc}{fnmatch}{filename\, pattern}
 Test whether the \var{filename} string matches the \var{pattern}
 string, returning true or false.  If the operating system is
diff --git a/Doc/lib/libquopri.tex b/Doc/lib/libquopri.tex
index 2fbd35a..a7395ec 100644
--- a/Doc/lib/libquopri.tex
+++ b/Doc/lib/libquopri.tex
@@ -12,6 +12,8 @@
 \indexii{RFC}{1521}
 \index{MIME!quoted-printable encoding}
 
+\renewcommand{\indexsubitem}{(in module quopri)}
+
 \begin{funcdesc}{decode}{input\, output}
 Decode the contents of the \var{input} file and write the resulting
 decoded binary data to the \var{output} file.
diff --git a/Doc/lib/libsocksvr.tex b/Doc/lib/libsocksvr.tex
index 1e3cac3..a45b948 100644
--- a/Doc/lib/libsocksvr.tex
+++ b/Doc/lib/libsocksvr.tex
@@ -36,6 +36,8 @@
 Server classes have the same external methods and attributes, no
 matter what network protocol they use:
 
+\renewcommand{\indexsubitem}{(in module SocketServer)}
+
 %XXX should data and methods be intermingled, or separate?
 % how should the distinction between class and instance variables be
 % drawn?
diff --git a/Doc/libbase64.tex b/Doc/libbase64.tex
index ab00ded..edd1920 100644
--- a/Doc/libbase64.tex
+++ b/Doc/libbase64.tex
@@ -13,6 +13,8 @@
 \indexii{RFC}{1421}
 \index{MIME, base 64 encoding}
 
+\renewcommand{\indexsubitem}{(in module base64)}
+
 \begin{funcdesc}{decode}{input\, output}
 Decode the contents of the \var{input} file and write the resulting
 binary data to the \var{output} file.
diff --git a/Doc/libfnmatch.tex b/Doc/libfnmatch.tex
index 86c9073..8bce50a 100644
--- a/Doc/libfnmatch.tex
+++ b/Doc/libfnmatch.tex
@@ -17,6 +17,8 @@
 special to this module.  See module \code{glob} for pathname expansion
 (\code{glob} uses \code{fnmatch} to match filename segments).
 
+\renewcommand{\indexsubitem}{(in module fnmatch)}
+
 \begin{funcdesc}{fnmatch}{filename\, pattern}
 Test whether the \var{filename} string matches the \var{pattern}
 string, returning true or false.  If the operating system is
diff --git a/Doc/libquopri.tex b/Doc/libquopri.tex
index 2fbd35a..a7395ec 100644
--- a/Doc/libquopri.tex
+++ b/Doc/libquopri.tex
@@ -12,6 +12,8 @@
 \indexii{RFC}{1521}
 \index{MIME!quoted-printable encoding}
 
+\renewcommand{\indexsubitem}{(in module quopri)}
+
 \begin{funcdesc}{decode}{input\, output}
 Decode the contents of the \var{input} file and write the resulting
 decoded binary data to the \var{output} file.
diff --git a/Doc/libsocksvr.tex b/Doc/libsocksvr.tex
index 1e3cac3..a45b948 100644
--- a/Doc/libsocksvr.tex
+++ b/Doc/libsocksvr.tex
@@ -36,6 +36,8 @@
 Server classes have the same external methods and attributes, no
 matter what network protocol they use:
 
+\renewcommand{\indexsubitem}{(in module SocketServer)}
+
 %XXX should data and methods be intermingled, or separate?
 % how should the distinction between class and instance variables be
 % drawn?