diff --git a/lib/prometheus/ecto_instrumenter.ex b/lib/prometheus/ecto_instrumenter.ex
index c1def53..5c92771 100644
--- a/lib/prometheus/ecto_instrumenter.ex
+++ b/lib/prometheus/ecto_instrumenter.ex
@@ -228,7 +228,7 @@ defmodule Prometheus.EctoInstrumenter do
                       name: unquote(stage_metric_name(stage, duration_unit)),
                       labels: labels
                     ],
-                    microseconds_time(value)
+                    value
                   )
                 end
               end
@@ -268,10 +268,6 @@ defmodule Prometheus.EctoInstrumenter do
           value
         end
       end
-
-      defp microseconds_time(time) do
-        System.convert_time_unit(time, :native, :microsecond)
-      end
     end
   end