diff --git a/acl/backup_config.pl b/acl/backup_config.pl
index 04934def0..b31a2dfc7 100755
--- a/acl/backup_config.pl
+++ b/acl/backup_config.pl
@@ -1,7 +1,7 @@
 
 use strict;
 use warnings;
-do 'acl-lib.pl';
+require 'acl-lib.pl';
 our ($config_directory, %gconfig);
 
 # backup_config_files()
diff --git a/adsl-client/backup_config.pl b/adsl-client/backup_config.pl
index d9aab62ab..b14b45291 100755
--- a/adsl-client/backup_config.pl
+++ b/adsl-client/backup_config.pl
@@ -1,5 +1,5 @@
 
-do 'adsl-client-lib.pl';
+require 'adsl-client-lib.pl';
 
 # backup_config_files()
 # Returns files and directories that can be backed up
diff --git a/apache/backup_config.pl b/apache/backup_config.pl
index 8bb094484..803fe8943 100755
--- a/apache/backup_config.pl
+++ b/apache/backup_config.pl
@@ -1,5 +1,5 @@
 
-do 'apache-lib.pl';
+require 'apache-lib.pl';
 
 # backup_config_files()
 # Returns files and directories that can be backed up
diff --git a/cron/backup_config.pl b/cron/backup_config.pl
index 25ff6017f..72870d114 100755
--- a/cron/backup_config.pl
+++ b/cron/backup_config.pl
@@ -1,5 +1,5 @@
 
-do 'cron-lib.pl';
+require 'cron-lib.pl';
 
 # backup_config_files()
 # Returns files and directories that can be backed up
diff --git a/iscsi-server/backup_config.pl b/iscsi-server/backup_config.pl
index f9a53131d..b0fec8c0b 100755
--- a/iscsi-server/backup_config.pl
+++ b/iscsi-server/backup_config.pl
@@ -1,5 +1,5 @@
 
-do 'iscsi-server-lib.pl';
+require 'iscsi-server-lib.pl';
 
 # backup_config_files()
 # Returns files and directories that can be backed up
diff --git a/iscsi-server/install_check.pl b/iscsi-server/install_check.pl
index 7ba3c4150..0643e0c4c 100755
--- a/iscsi-server/install_check.pl
+++ b/iscsi-server/install_check.pl
@@ -1,6 +1,6 @@
 # install_check.pl
 
-do 'iscsi-server-lib.pl';
+require 'iscsi-server-lib.pl';
 
 # is_installed(mode)
 # For mode 1, returns 2 if the server is installed and configured for use by
diff --git a/iscsi-server/log_parser.pl b/iscsi-server/log_parser.pl
index fcf6bf464..8a7e8abc2 100755
--- a/iscsi-server/log_parser.pl
+++ b/iscsi-server/log_parser.pl
@@ -1,7 +1,7 @@
 # log_parser.pl
 # Functions for parsing this module's logs
 
-do 'iscsi-server-lib.pl';
+require 'iscsi-server-lib.pl';
 
 # parse_webmin_log(user, script, action, type, object, &params)
 # Converts logged information from this module into human-readable form