diff --git a/webrtc/modules/remote_bitrate_estimator/overuse_detector.h b/webrtc/modules/remote_bitrate_estimator/overuse_detector.h
index 03ddb1ee6a..fc1cc152ec 100644
--- a/webrtc/modules/remote_bitrate_estimator/overuse_detector.h
+++ b/webrtc/modules/remote_bitrate_estimator/overuse_detector.h
@@ -18,7 +18,6 @@
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
-enum RateControlRegion;
 
 bool AdaptiveThresholdExperimentIsDisabled();