diff --git a/src/calibre/trac/plugins/download.py b/src/calibre/trac/plugins/download.py
index 0483690b64..43ca425114 100644
--- a/src/calibre/trac/plugins/download.py
+++ b/src/calibre/trac/plugins/download.py
@@ -240,7 +240,7 @@ If not, head over to <a href="http://calibre.kovidgoyal.net/wiki/Development#Tra
         return 'download.html', data, None
                             
 
-LINUX_INSTALLER = '''
+LINUX_INSTALLER = r'''
 import sys, os, shutil, tarfile, subprocess, tempfile, urllib2, re, stat
 
 MOBILEREAD='https://dev.mobileread.com/dist/kovid/calibre/'
@@ -431,4 +431,4 @@ def main():
     pi = os.path.join(destdir, calibre_postinstall)
     subprocess.call('pi', shell=True)
     return 0
-'''
\ No newline at end of file
+'''