diff --git a/ManagedPool/Pool_T_.cs b/ManagedPool/Pool_T_.cs
index fb4e65d..d26e248 100644
--- a/ManagedPool/Pool_T_.cs
+++ b/ManagedPool/Pool_T_.cs
@@ -87,6 +87,7 @@ namespace eu.railduction.netcore.dll.ManagedPool
             if (batch <= 0) throw new InvalidOperationException($"Invalid parameter batch='{batch}'. Must be at least '1'!");
             if (increaseBuffer <= 0) throw new InvalidOperationException($"Invalid parameter increaseBuffer='{increaseBuffer}'. Must be at least '1'!");
             if (decreaseBuffer <= 0) throw new InvalidOperationException($"Invalid parameter decreaseBuffer='{decreaseBuffer}'. Must be at least '1'!");
+            if (batch < decreaseBuffer) throw new InvalidOperationException($"Invalid parameter decreaseBuffer='{decreaseBuffer}'. Must be at least batch='{batch}'!");
         }
 
         private T getItem()