diff --git a/dom/media/eme/EMEUtils.h b/dom/media/eme/EMEUtils.h
index 42483b9a0c..1fa9f7590b 100644
--- a/dom/media/eme/EMEUtils.h
+++ b/dom/media/eme/EMEUtils.h
@@ -11,6 +11,7 @@
 #include "mozilla/Logging.h"
 #include "nsString.h"
 #include "nsTArray.h"
+#include "mozilla/dom/TypedArray.h"
 
 namespace mozilla {