diff --git a/src/OpenTelemetry.Exporter.Prometheus.HttpListener/PrometheusHttpListener.cs b/src/OpenTelemetry.Exporter.Prometheus.HttpListener/PrometheusHttpListener.cs
index f8d5a4c393a..d4dbe052883 100644
--- a/src/OpenTelemetry.Exporter.Prometheus.HttpListener/PrometheusHttpListener.cs
+++ b/src/OpenTelemetry.Exporter.Prometheus.HttpListener/PrometheusHttpListener.cs
@@ -194,7 +194,7 @@ private async Task ProcessRequestAsync(HttpListenerContext context)
         }
     }
 
-    private bool AcceptsOpenMetrics(HttpListenerRequest request)
+    private static AcceptsOpenMetrics(HttpListenerRequest request)
     {
         if (request.AcceptTypes == null)
         {