diff --git a/lib/Makefile.am b/lib/Makefile.am
index 434bb13837..9fc3505e8e 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -1309,6 +1309,11 @@ dist_tex_DATA = \
 	tex/lyxskak.sty \
 	tex/revtex.cls
 
+# subscript.sty is not in dist_tex_DATA since we don't want to install it
+# (it is part of TeXLive). We include it in our source package only so that
+# packagers may decide to install it (e.g. for MikTeX).
+dist_noinst_DATA += tex/subscript.sty
+
 uidir = $(pkgdatadir)/ui
 dist_ui_DATA = \
 	ui/classic.ui \
diff --git a/lib/tex/subscript.sty b/lib/tex/subscript.sty
new file mode 100644
index 0000000000..fc9f6e34f4
--- /dev/null
+++ b/lib/tex/subscript.sty
@@ -0,0 +1,18 @@
+% subscript.sty
+%
+% Copyright 1999 Robin Fairbairns
+%
+% this fragment is distributed under the conditions of the LaTeX
+% Project Public Licence -- see lppl.txt in the LaTeX distribution
+%
+% this fragment provides a command \textsubscript, which is
+% shamelessly copied from the command \textsuperscript that's part of
+% LaTeX
+%
+% the fragment may be used as a package in its own right, if so
+% needed.
+
+\DeclareRobustCommand*\textsubscript[1]{%
+  \@textsubscript{\selectfont#1}}
+\def\@textsubscript#1{%
+  {\m@th\ensuremath{_{\mbox{\fontsize\sf@size\z@#1}}}}}