diff --git a/INSTALL b/INSTALL
index 9498fc52da..e2dd28dd6b 100644
--- a/INSTALL
+++ b/INSTALL
@@ -36,7 +36,7 @@ Default installation instructions:
 5. sudo ln -s /etc/koha/koha-httpd.conf /etc/apache2/sites-available/koha
   (note that the path to koha-httpd.conf may be different depending on your
   installation choices)
-6. sudo a2enmod rewrite
+6. sudo a2enmod rewrite deflate
 7. sudo a2ensite koha && /etc/init.d/apache2 reload
 8. sudo zebrasrv -f /etc/koha/koha-conf.xml
   (note that you will want to run Zebra in daemon mode for a production
diff --git a/INSTALL.debian b/INSTALL.debian
index e5c560d5d1..345bdb1555 100644
--- a/INSTALL.debian
+++ b/INSTALL.debian
@@ -186,7 +186,7 @@ Add the following lines to /etc/apache2/ports.conf:
 
 Run the following commands:
 
-    $ sudo a2enmod rewrite
+    $ sudo a2enmod rewrite deflate
     $ sudo a2ensite koha
     $ sudo apache2ctl restart
 
diff --git a/INSTALL.opensuse b/INSTALL.opensuse
index 4f232798ea..2ffb2fcedb 100644
--- a/INSTALL.opensuse
+++ b/INSTALL.opensuse
@@ -2753,13 +2753,13 @@ Invalid command 'RewriteEngine', perhaps misspelled or defined by a module not i
 
 
 
-== Enable the mod_rewrite Apache module ==
+== Enable the mod_rewrite and mod_deflate Apache modules ==
 
-OK... It seems that we need to enable the mod_rewrite Apache module:
+OK... It seems that we need to enable the mod_rewrite and the mod_deflate Apache module:
 |--------------------
-myhost:/etc/sysconfig # a2enmod rewrite
+myhost:/etc/sysconfig # a2enmod rewrite deflate
 |--------------------
-[If the above command seems NOT to work, for some reason, do this - edit /etc/sysconfig/apache2 and add the word "rewrite" (without the quotes) at the end of the APACHE_MODULES line, right before the right quote]
+[If the above command seems NOT to work, for some reason, do this - edit /etc/sysconfig/apache2 and add the words "rewrite" -and "deflate"- (without the quotes) at the end of the APACHE_MODULES line, right before the right quote]
 |--------------------
 myhost:/etc/sysconfig # service apache2 restart
 Syntax OK
diff --git a/INSTALL.ubuntu b/INSTALL.ubuntu
index 58220caa09..23214ae98e 100644
--- a/INSTALL.ubuntu
+++ b/INSTALL.ubuntu
@@ -257,7 +257,7 @@ If not running named virtual hosts (The default koha installation does not use n
 
 Run the following commands:
 
-    $ sudo a2enmod rewrite
+    $ sudo a2enmod rewrite deflate
     $ sudo a2ensite koha
     $ sudo apache2ctl restart
 
diff --git a/INSTALL.ubuntu.lucid b/INSTALL.ubuntu.lucid
index 4d7722721d..e569f3b8da 100644
--- a/INSTALL.ubuntu.lucid
+++ b/INSTALL.ubuntu.lucid
@@ -191,7 +191,7 @@ named virtual hosts.), comment out the following line:
 
 Run the following commands:
 
-    $ sudo a2enmod rewrite
+    $ sudo a2enmod rewrite deflate
     $ sudo a2ensite koha
     $ sudo apache2ctl restart