diff --git a/phpBB/adm/index.php b/phpBB/adm/index.php
index 74e51a8696..68508bc353 100644
--- a/phpBB/adm/index.php
+++ b/phpBB/adm/index.php
@@ -276,7 +276,7 @@ function build_cfg_template($tpl_type, $key, &$new, $config_key, $vars)
 			$size = (int) $tpl_type[1];
 			$maxlength = (int) $tpl_type[2];
 
-			$tpl = '<input id="' . $key . '" type="' . $tpl_type[0] . '"' . (($size) ? ' size="' . $size . '"' : '') . ' maxlength="' . (($maxlength) ? $maxlength : 255) . '" name="' . $name . '" value="' . $new[$config_key] . '" />';
+			$tpl = '<input id="' . $key . '" type="' . $tpl_type[0] . '"' . (($size) ? ' size="' . $size . '"' : '') . ' maxlength="' . (($maxlength) ? $maxlength : 255) . '" name="' . $name . '" value="' . $new[$config_key] . '"' . (($tpl_type[0] === 'password') ?  ' autocomplete="off"' : '') . ' />';
 		break;
 
 		case 'dimension':
diff --git a/phpBB/adm/style/acp_forums.html b/phpBB/adm/style/acp_forums.html
index 9201736085..8577c08860 100644
--- a/phpBB/adm/style/acp_forums.html
+++ b/phpBB/adm/style/acp_forums.html
@@ -166,11 +166,11 @@
 	</dl>
 	<dl>
 		<dt><label for="forum_password">{L_FORUM_PASSWORD}:</label><br /><span>{L_FORUM_PASSWORD_EXPLAIN}</span></dt>
-		<dd><input type="password" id="forum_password" name="forum_password" value="<!-- IF S_FORUM_PASSWORD_SET -->&#x20;&#x20;&#x20;&#x20;&#x20;&#x20;<!-- ENDIF -->" /></dd>
+		<dd><input type="password" id="forum_password" name="forum_password" value="<!-- IF S_FORUM_PASSWORD_SET -->&#x20;&#x20;&#x20;&#x20;&#x20;&#x20;<!-- ENDIF -->" autocomplete="off" /></dd>
 	</dl>
 	<dl>
 		<dt><label for="forum_password_confirm">{L_FORUM_PASSWORD_CONFIRM}:</label><br /><span>{L_FORUM_PASSWORD_CONFIRM_EXPLAIN}</span></dt>
-		<dd><input type="password" id="forum_password_confirm" name="forum_password_confirm" value="<!-- IF S_FORUM_PASSWORD_SET -->&#x20;&#x20;&#x20;&#x20;&#x20;&#x20;<!-- ENDIF -->" /></dd>
+		<dd><input type="password" id="forum_password_confirm" name="forum_password_confirm" value="<!-- IF S_FORUM_PASSWORD_SET -->&#x20;&#x20;&#x20;&#x20;&#x20;&#x20;<!-- ENDIF -->" autocomplete="off" /></dd>
 	</dl>
 	<!-- IF S_FORUM_PASSWORD_SET -->
 	<dl>
diff --git a/phpBB/adm/style/acp_users_overview.html b/phpBB/adm/style/acp_users_overview.html
index 911dcad293..9237e45daf 100644
--- a/phpBB/adm/style/acp_users_overview.html
+++ b/phpBB/adm/style/acp_users_overview.html
@@ -43,19 +43,19 @@
 </dl>
 <dl>
 	<dt><label for="user_email">{L_EMAIL}:</label></dt>
-	<dd><input class="text medium" type="text" id="user_email" name="user_email" value="{USER_EMAIL}" /></dd>
+	<dd><input class="text medium" type="text" id="user_email" name="user_email" value="{USER_EMAIL}" autocomplete="off" /></dd>
 </dl>
 <dl>
 	<dt><label for="email_confirm">{L_CONFIRM_EMAIL}:</label><br /><span>{L_CONFIRM_EMAIL_EXPLAIN}</span></dt>
-	<dd><input class="text medium" type="text" id="email_confirm" name="email_confirm" value="" /></dd>
+	<dd><input class="text medium" type="text" id="email_confirm" name="email_confirm" value="" autocomplete="off" /></dd>
 </dl>
 <dl>
 	<dt><label for="new_password">{L_NEW_PASSWORD}:</label><br /><span>{L_CHANGE_PASSWORD_EXPLAIN}</span></dt>
-	<dd><input type="password" id="new_password" name="new_password" value="" /></dd>
+	<dd><input type="password" id="new_password" name="new_password" value="" autocomplete="off" /></dd>
 </dl>
 <dl>
 	<dt><label for="password_confirm">{L_CONFIRM_PASSWORD}:</label><br /><span>{L_CONFIRM_PASSWORD_EXPLAIN}</span></dt>
-	<dd><input type="password" id="password_confirm" name="password_confirm" value="" /></dd>
+	<dd><input type="password" id="password_confirm" name="password_confirm" value="" autocomplete="off" /></dd>
 </dl>
 
 <p class="quick">
diff --git a/phpBB/includes/auth/auth_ldap.php b/phpBB/includes/auth/auth_ldap.php
index e8c957aaa3..5dfa74ddab 100644
--- a/phpBB/includes/auth/auth_ldap.php
+++ b/phpBB/includes/auth/auth_ldap.php
@@ -335,7 +335,7 @@ function acp_ldap(&$new)
 	</dl>
 	<dl>
 		<dt><label for="ldap_password">' . $user->lang['LDAP_PASSWORD'] . ':</label><br /><span>' . $user->lang['LDAP_PASSWORD_EXPLAIN'] . '</span></dt>
-		<dd><input type="password" id="ldap_password" size="40" name="config[ldap_password]" value="' . $new['ldap_password'] . '" /></dd>
+		<dd><input type="password" id="ldap_password" size="40" name="config[ldap_password]" value="' . $new['ldap_password'] . '" autocomplete="off" /></dd>
 	</dl>
 	';