--- a/content/media/gstreamer/GStreamerLoader.h
+++ b/content/media/gstreamer/GStreamerLoader.h
@@ -7,17 +7,25 @@
 #define GStreamerLoader_h_
 
 #include <gst/gst.h>
 #include <gst/gstbuffer.h>
 #include <gst/gstelementfactory.h>
 #include <gst/gststructure.h>
 #include <gst/app/gstappsrc.h>
 #include <gst/app/gstappsink.h>
+// This include trips -Wreserved-user-defined-literal on clang. Ignoring it
+// trips -Wpragmas on GCC (unknown warning), but ignoring that trips
+// -Wunknown-pragmas on clang (unknown pragma).
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunknown-pragmas"
+#pragma GCC diagnostic ignored "-Wpragmas"
+#pragma GCC diagnostic ignored "-Wreserved-user-defined-literal"
 #include <gst/video/video.h>
+#pragma GCC diagnostic pop
 
 namespace mozilla {
 
 /*
  * dlopens the required libraries and dlsyms the functions we need.
  * Returns true on success, false otherwise.
  */
 bool load_gstreamer();

--- a/content/media/gstreamer/GStreamerReader.h
+++ b/content/media/gstreamer/GStreamerReader.h
@@ -3,17 +3,21 @@
  * You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #if !defined(GStreamerReader_h_)
 #define GStreamerReader_h_
 
 #include <gst/gst.h>
 #include <gst/app/gstappsrc.h>
 #include <gst/app/gstappsink.h>
+// This include trips -Wreserved-user-defined-literal on clang. Ignoring it
+// trips -Wpragmas on GCC (unknown warning), but ignoring that trips
+// -Wunknown-pragmas on clang (unknown pragma).
 #pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunknown-pragmas"
 #pragma GCC diagnostic ignored "-Wpragmas"
 #pragma GCC diagnostic ignored "-Wreserved-user-defined-literal"
 #include <gst/video/video.h>
 #pragma GCC diagnostic pop
 #include <map>
 #include "MediaDecoderReader.h"
 
 namespace mozilla {