diff --git a/lib/icinga/plugin/New-IcingaCheckPackage.psm1 b/lib/icinga/plugin/New-IcingaCheckPackage.psm1
index 8d8428e..5c11fcb 100644
--- a/lib/icinga/plugin/New-IcingaCheckPackage.psm1
+++ b/lib/icinga/plugin/New-IcingaCheckPackage.psm1
@@ -35,6 +35,8 @@ function New-IcingaCheckPackage()
     }
 
     $Check | Add-Member -membertype ScriptMethod -name 'InitCheck' -value {
+        param($check);
+
         if ($null -eq $check) {
             return;
         }