diff --git a/dom/media/mediasource/MediaSourceReader.cpp b/dom/media/mediasource/MediaSourceReader.cpp
index 345d828938..7fc2a54df6 100644
--- a/dom/media/mediasource/MediaSourceReader.cpp
+++ b/dom/media/mediasource/MediaSourceReader.cpp
@@ -90,6 +90,7 @@ MediaSourceReader::IsWaitingMediaResources()
   return !mHasEssentialTrackBuffers;
 }
 
+bool
 MediaSourceReader::IsWaitingOnCDMResource()
 {
   // EME not supported