diff --git a/dom/media/platforms/wmf/WMFMediaDataDecoder.cpp b/dom/media/platforms/wmf/WMFMediaDataDecoder.cpp
index a5400897adb4..e06ecee2f0c2 100644
--- a/dom/media/platforms/wmf/WMFMediaDataDecoder.cpp
+++ b/dom/media/platforms/wmf/WMFMediaDataDecoder.cpp
@@ -65,7 +65,10 @@ SendTelemetry(unsigned long hr)
     [sample] {
       Telemetry::Accumulate(Telemetry::MEDIA_WMF_DECODE_ERROR, sample);
     });
-  NS_DispatchToMainThread(runnable);
+
+  SystemGroup::Dispatch("WMFMediaDataDecoder::SendTelemetry",
+                        TaskCategory::Other,
+                        runnable.forget());
 }
 
 RefPtr<ShutdownPromise>