diff --git a/webrtc/video/video_send_stream.cc b/webrtc/video/video_send_stream.cc
index a39b76b616..04748f8d3f 100644
--- a/webrtc/video/video_send_stream.cc
+++ b/webrtc/video/video_send_stream.cc
@@ -10,6 +10,7 @@
 #include "webrtc/video/video_send_stream.h"
 
 #include <algorithm>
+#include <cmath>
 #include <sstream>
 #include <string>
 #include <utility>