diff --git a/rtc_tools/video_file_writer.cc b/rtc_tools/video_file_writer.cc
index 72f3a6919e..87c6a1e72c 100644
--- a/rtc_tools/video_file_writer.cc
+++ b/rtc_tools/video_file_writer.cc
@@ -16,6 +16,7 @@
 #include "api/video/i420_buffer.h"
 #include "rtc_base/logging.h"
 #include "rtc_base/refcountedobject.h"
+#include "rtc_base/stringutils.h"
 
 namespace webrtc {
 namespace test {