diff --git a/src/OpenTelemetry.Exporter.Prometheus.AspNetCore/PrometheusExporterMiddleware.cs b/src/OpenTelemetry.Exporter.Prometheus.AspNetCore/PrometheusExporterMiddleware.cs
index 223ed4d8c00..72145bdaed2 100644
--- a/src/OpenTelemetry.Exporter.Prometheus.AspNetCore/PrometheusExporterMiddleware.cs
+++ b/src/OpenTelemetry.Exporter.Prometheus.AspNetCore/PrometheusExporterMiddleware.cs
@@ -117,6 +117,14 @@ private static bool AcceptsOpenMetrics(HttpRequest request)
             return false;
         }
 
-        return acceptHeader.Any(PrometheusHeadersParser.AcceptsOpenMetrics);
+        foreach (var header in acceptHeader)
+        {
+            if (PrometheusHeadersParser.AcceptsOpenMetrics(header))
+            {
+                return true;
+            }
+        }
+
+        return false;
     }
 }