diff --git a/utils/roll_browser.js b/utils/roll_browser.js
index 1c94a6aa4e..47559ae103 100755
--- a/utils/roll_browser.js
+++ b/utils/roll_browser.js
@@ -30,7 +30,7 @@ function usage() {
 usage: ${SCRIPT_NAME} <browser> <revision>
 
 Roll the <browser> to a specific <revision> and generate new protocol.
-Supported browsers: chromium, firefox, webkit.
+Supported browsers: chromium, firefox, webkit, ffmpeg.
 
 Example:
   ${SCRIPT_NAME} chromium 123456