diff --git a/layout/media/symbols.def.in b/layout/media/symbols.def.in
index c7cba45183..6a940cd75b 100644
--- a/layout/media/symbols.def.in
+++ b/layout/media/symbols.def.in
@@ -139,6 +139,7 @@ cubeb_get_backend_id
 cubeb_get_max_channel_count
 cubeb_get_min_latency
 cubeb_get_preferred_sample_rate
+cubeb_set_log_callback
 cubeb_stream_destroy
 cubeb_stream_get_position
 cubeb_stream_init