diff --git a/src/www/system_camanager.php b/src/www/system_camanager.php
index 734c81763..8c01bd636 100644
--- a/src/www/system_camanager.php
+++ b/src/www/system_camanager.php
@@ -307,7 +307,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
                     if (preg_match("/[\!\@\#\$\%\^\(\)\~\?\>\<\&\/\\\,\"\']/", $pconfig["dn_commonname"])) {
                         $input_errors[] = gettext("The field 'Distinguished name Common Name' contains invalid characters.");
                     }
-                } elseif (($reqdfields[$i] != "descr") && preg_match("/[\!\@\#\$\%\^\(\)\~\?\>\<\&\/\\\,\.\"\']/", $pconfig["$reqdfields[$i]"])) {
+                } elseif (($reqdfields[$i] != "descr") && preg_match("/[\!\@\#\$\%\^\(\)\~\?\>\<\&\/\\\,\"\']/", $pconfig["$reqdfields[$i]"])) {
                     $input_errors[] = sprintf(gettext("The field '%s' contains invalid characters."), $reqdfieldsn[$i]);
                 }
             }
diff --git a/src/www/system_certmanager.php b/src/www/system_certmanager.php
index 64f00a927..688471a31 100644
--- a/src/www/system_certmanager.php
+++ b/src/www/system_certmanager.php
@@ -379,7 +379,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
                     if (preg_match("/[\!\@\#\$\%\^\(\)\~\?\>\<\&\/\\\,\"\']/", $pconfig[$reqdfields[$i]])) {
                         $input_errors[] = gettext("The field 'Distinguished name Common Name' contains invalid characters.");
                     }
-                } elseif (($reqdfields[$i] != "descr") && preg_match("/[\!\@\#\$\%\^\(\)\~\?\>\<\&\/\\\,\.\"\']/", $pconfig[$reqdfields[$i]])) {
+                } elseif (($reqdfields[$i] != "descr") && preg_match("/[\!\@\#\$\%\^\(\)\~\?\>\<\&\/\\\,\"\']/", $pconfig[$reqdfields[$i]])) {
                     $input_errors[] = sprintf(gettext("The field '%s' contains invalid characters."), $reqdfieldsn[$i]);
                 }
             }