diff --git a/doc/Installation/Installation-(Debian-Ubuntu).md b/doc/Installation/Installation-(Debian-Ubuntu).md
index 45dd02778..eecd4c295 100644
--- a/doc/Installation/Installation-(Debian-Ubuntu).md
+++ b/doc/Installation/Installation-(Debian-Ubuntu).md
@@ -134,7 +134,7 @@ Change the values to the right of the equal sign for lines beginning with `$conf
 
 Change the value of `$config['snmp']['community']` from `public` to whatever your read-only SNMP community is.  If you have multiple communities, set it to the most common.
 
-** Be sure you have no characters (including whitespace like: newlines, spaces, tabs, etc) outside of the `<?php>` blocks. Your graphs will break otherwise. **
+** Be sure you have no characters (including whitespace like: newlines, spaces, tabs, etc) outside of the `<?php?>` blocks. Your graphs will break otherwise. **
 
 ### Initialise the database ###
 
diff --git a/doc/Installation/Installation-(RHEL-CentOS).md b/doc/Installation/Installation-(RHEL-CentOS).md
index 9d9575089..a2e093fcf 100644
--- a/doc/Installation/Installation-(RHEL-CentOS).md
+++ b/doc/Installation/Installation-(RHEL-CentOS).md
@@ -143,7 +143,7 @@ Add the following line to the end of `config.php`:
 
     $config['fping'] = "/usr/sbin/fping";
 
-** Be sure you have no characters (including whitespace like: newlines, spaces, tabs, etc) outside of the `<?php>` blocks. Your graphs will break otherwise. **
+** Be sure you have no characters (including whitespace like: newlines, spaces, tabs, etc) outside of the `<?php?>` blocks. Your graphs will break otherwise. **
 
 ### Initialise the database ###
 
diff --git a/doc/Installation/Installation-Lighttpd-(Debian-Ubuntu).md b/doc/Installation/Installation-Lighttpd-(Debian-Ubuntu).md
index c844878dd..0e14d7230 100644
--- a/doc/Installation/Installation-Lighttpd-(Debian-Ubuntu).md
+++ b/doc/Installation/Installation-Lighttpd-(Debian-Ubuntu).md
@@ -58,7 +58,7 @@ Change the values to the right of the equal sign for lines beginning with `$conf
 
 Change the value of `$config['snmp']['community']` from `public` to whatever your read-only SNMP community is.  If you have multiple communities, set it to the most common.
 
-** Be sure you have no characters (including whitespace like: newlines, spaces, tabs, etc) outside of the `<?php>` blocks. Your graphs will break otherwise. **
+** Be sure you have no characters (including whitespace like: newlines, spaces, tabs, etc) outside of the `<?php?>` blocks. Your graphs will break otherwise. **
 
 ### Initialise the database ###