diff --git a/lib/icinga/plugin/New-IcingaCheckResult.psm1 b/lib/icinga/plugin/New-IcingaCheckResult.psm1
index c7126ff..b7b07c6 100644
--- a/lib/icinga/plugin/New-IcingaCheckResult.psm1
+++ b/lib/icinga/plugin/New-IcingaCheckResult.psm1
@@ -13,7 +13,7 @@ function New-IcingaCheckresult()
     $CheckResult | Add-Member -membertype NoteProperty -name 'noperfdata' -value $NoPerfData;
 
     $CheckResult | Add-Member -membertype ScriptMethod -name 'Compile' -value {
-        if ($this.check -eq $null) {
+        if ($null -eq $this.check) {
             return $IcingaEnums.IcingaExitCode.Unknown;
         }