diff --git a/lib/addressbook.php b/lib/addressbook.php
index 1dea6814..f9535997 100644
--- a/lib/addressbook.php
+++ b/lib/addressbook.php
@@ -166,7 +166,7 @@ class Addressbook extends AbstractPIMCollection {
 		//\OCP\Util::writeLog('contacts', __METHOD__.' id: '.$id, \OCP\Util::DEBUG);
 		if (!$this->hasPermission(\OCP\PERMISSION_READ)) {
 			throw new \Exception(
-				self::$l10n->t('You do not have permissions to see this contacts'),
+				self::$l10n->t('You do not have permissions to see this contact'),
 				Http::STATUS_FORBIDDEN
 			);
 		}
diff --git a/lib/contact.php b/lib/contact.php
index 8eeaad71..b7a2e710 100644
--- a/lib/contact.php
+++ b/lib/contact.php
@@ -296,7 +296,7 @@ class Contact extends VObject\VCard implements IPIMObject {
 			}
 		} else {
 			if (!$this->getBackend()->hasContactMethodFor(\OCP\PERMISSION_CREATE)) {
-				throw new \Exception(self::$l10n->t('This backend not support adding contacts'), 501);
+				throw new \Exception(self::$l10n->t('This backend does not support adding contacts'), 501);
 			}
 			$this->props['id'] = $this->getBackend()->createContact(
 				$this->getParent()->getId(), $this