1 files changed, 3 insertions, 1 deletions
diff --git a/dom/media/platforms/wmf/WMFUtils.cpp b/dom/media/platforms/wmf/WMFUtils.cpp
index dda9df808e..bf5b8fe67d 100644
--- a/dom/media/platforms/wmf/WMFUtils.cpp
+++ b/dom/media/platforms/wmf/WMFUtils.cpp
@@ -333,7 +333,9 @@ GUID VideoMimeTypeToMediaFoundationSubtype(const nsACString& aMimeType) {
   if (MP4Decoder::IsHEVC(aMimeType)) {
     return MFVideoFormat_HEVC;
   }
-  NS_WARNING("Unsupport video mimetype");
+  NS_WARNING(nsAutoCString(nsDependentCString("Unsupported video mimetype ") +
+                           aMimeType)
+                 .get());
   return GUID_NULL;
 }