diff --git a/lib/scripts/lyxsweave.R b/lib/scripts/lyxsweave.R
index 09dad2d273..25cfcb3ac3 100644
--- a/lib/scripts/lyxsweave.R
+++ b/lib/scripts/lyxsweave.R
@@ -3,6 +3,7 @@
 # Licence details can be found in the file COPYING.
 
 # author Jean-Marc Lasgouttes
+# author Yihui Xie
 
 # Full author contact details are available in file CREDITS
 
@@ -15,10 +16,16 @@
 ls.args <- commandArgs(trailingOnly=TRUE)
 
 # check whether Sweave.sty is seen by LaTeX. if it is not, we will
-# pass the option stylepath=TRUE to sweave so that a full path is given
-# to \usepackage.
+# copy it alongside the .tex file (in general in the temporary
+# directory). This means that an exported LaTeX file will not work,
+# but this is a problem of installation of R on the user's machine.
+# The advantage compared to the use of stylepath, is that the exported
+# .tex file will be portable to another machine. (JMarc)
 ls.sweavesty <- system("kpsewhich Sweave.sty", intern=TRUE, ignore.stderr=TRUE)
-ls.sp <- (length(ls.sweavesty) == 0)
+if (!length(ls.sweavesty)) {
+   stypath <- file.path(R.home("share"), "texmf", "tex", "latex", "Sweave.sty")
+   file.copy(stypath, dirname(ls.args[2]), overwrite=TRUE)
+}
 
 # set default encoding for input and output files; ls.enc is used in
 # the sweave module preamble to reset the encoding to what it was.
@@ -36,7 +43,7 @@ tmpout <- gsub(".", "-", sub("\\.tex$", "", basename(ls.args[2])), fixed = TRUE)
 ls.pr <- paste(dirname(ls.args[2]), tmpout, sep="/")
 
 # finally run sweave
-Sweave(file=ls.args[1], output=ls.args[2], syntax="SweaveSyntaxNoweb", stylepath=ls.sp, prefix.string=ls.pr)
+Sweave(file=ls.args[1], output=ls.args[2], syntax="SweaveSyntaxNoweb", prefix.string=ls.pr)
 
 # remove absolute path from \includegraphics
 ls.doc = readLines(ls.args[2])