diff --git a/lib/get_process_mem.rb b/lib/get_process_mem.rb
index cb16acd..4ef9cfe 100644
--- a/lib/get_process_mem.rb
+++ b/lib/get_process_mem.rb
@@ -3,14 +3,8 @@
 
 # Cribbed from Unicorn Worker Killer, thanks!
 class GetProcessMem
-  if Kernel.respond_to?(:BigDecimal)
-    private_class_method def self.number_to_bigdecimal(value)
-      BigDecimal(value)
-    end
-  else
-    private_class_method def self.number_to_bigdecimal(value)
-      BigDecimal.new(value)
-    end
+  private_class_method def self.number_to_bigdecimal(value)
+    BigDecimal(value)
   end
 
   private def number_to_bigdecimal(value)