diff --git a/lib/core/perfcounter/Show-IcingaPerformanceCounters.psm1 b/lib/core/perfcounter/Show-IcingaPerformanceCounters.psm1
index 5080aa6..2d2bb80 100644
--- a/lib/core/perfcounter/Show-IcingaPerformanceCounters.psm1
+++ b/lib/core/perfcounter/Show-IcingaPerformanceCounters.psm1
@@ -53,5 +53,5 @@ function Show-IcingaPerformanceCounters()
         $counters.Add('error', $_.Exception.Message);
     }
 
-    return $counters;
+    return $counters.Keys;
 }
diff --git a/lib/provider/memory/Get-IcingaMemoryPerformanceCounter.psm1 b/lib/provider/memory/Get-IcingaMemoryPerformanceCounter.psm1
index 49e29e7..fdbf42b 100644
--- a/lib/provider/memory/Get-IcingaMemoryPerformanceCounter.psm1
+++ b/lib/provider/memory/Get-IcingaMemoryPerformanceCounter.psm1
@@ -1,6 +1,6 @@
 function Get-IcingaMemoryPerformanceCounter()
 {
-    $MemoryStart       = (Show-IcingaPerformanceCounters -CounterCategory 'Memory').Keys;
+    $MemoryStart       = (Show-IcingaPerformanceCounters -CounterCategory 'Memory');
     $MemoryCounter     = New-IcingaPerformanceCounterArray -Counter $MemoryStart;
     [hashtable]$Result = @{};