diff --git a/php/class.pluginmdmmodule.php b/php/class.pluginmdmmodule.php
index 814f2a6..bbc809d 100755
--- a/php/class.pluginmdmmodule.php
+++ b/php/class.pluginmdmmodule.php
@@ -161,24 +161,24 @@ class PluginMDMModule extends Module
 							$this->handleUnknownActionType($actionType);
 					}
 				} catch (SoapFault $fault) {
-					$display_message = _('Something went wrong.', 'plugin_mdm');
+					$display_message = dgettext('plugin_mdm', 'Something went wrong.');
 					if ($fault->faultcode === 'HTTP') {
 						if ($fault->getMessage() === "Unauthorized") {
-							$display_message = _('Unable to connect to Z-Push Server. Unauthorized.', 'plugin_mdm');
+							$display_message = dgettext('plugin_mdm', 'Unable to connect to Z-Push Server. Unauthorized.');
 						}
 						if ($fault->getMessage() === "Could not connect to host") {
-							$display_message = _('Unable to connect to Z-Push Server. Could not connect to host.', 'plugin_mdm');
+							$display_message = dgettext('plugin_mdm', 'Unable to connect to Z-Push Server. Could not connect to host.');
 						}
 						if ($fault->getMessage() === "Not Found") {
-							$display_message = _('Unable to connect to Z-Push Server. Not found.', 'plugin_mdm');
+							$display_message = dgettext('plugin_mdm', 'Unable to connect to Z-Push Server. Not found.');
 						}
 					} else if ($fault->faultcode === "ERROR") {
-						$display_message = _('Device ID could not be found', 'plugin_mdm');
+						$display_message = dgettext('plugin_mdm', 'Device ID could not be found');
 					}
 					$this->sendFeedback(false, array("type" => ERROR_GENERAL, "info" => array('display_message' => $display_message)));
 				}
 				catch (Exception $e) {
-					$this->sendFeedback(true, array("type" => ERROR_GENERAL, "info" => array('display_message' => _('Something went wrong', 'plugin_mdm'))));
+					$this->sendFeedback(true, array("type" => ERROR_GENERAL, "info" => array('display_message' => dgettext('plugin_mdm', 'Something went wrong'))));
 				}
 			}
 		}