1 files changed, 1 insertions, 1 deletions
diff --git a/actions/apigroupismember.php b/actions/apigroupismember.php
index 08348e97b..69ead0b53 100644
--- a/actions/apigroupismember.php
+++ b/actions/apigroupismember.php
@@ -111,7 +111,7 @@ class ApiGroupIsMemberAction extends ApiBareAuthAction
             break;
         default:
             $this->clientError(
-                _('API method not found!'),
+                _('API method not found.'),
                 400,
                 $this->format
             );