diff --git a/installer.sh b/installer.sh
index 407e7cb..8c41527 100644
--- a/installer.sh
+++ b/installer.sh
@@ -360,9 +360,9 @@ echo "Listen: 127.0.0.1:10025" >> /etc/clamsmtpd.conf
 echo "OutAddress: 10026" >> /etc/clamsmtpd.conf
 echo "# A header to add to all scanned email" >> /etc/clamsmtpd.conf
 echo "Header: X-AV-Checked: ClamAV using ClamSMTP" >> /etc/clamsmtpd.conf
-echo "# virus scanning" >> /etc/postfix/master.cf
-echo "content_filter = scan:127.0.0.1:10025" >> /etc/postfix/master.cf
-echo "receive_override_options = no_address_mappings" >> /etc/postfix/master.cf
+echo "# virus scanning" >> /etc/postfix/main.cf
+echo "content_filter = scan:127.0.0.1:10025" >> /etc/postfix/main.cf
+echo "receive_override_options = no_address_mappings" >> /etc/postfix/main.cf
 
 ##-----------------------##
 #    Enabling Services    #