diff --git a/src/compatibility/5.1/android-5.1-cdd.html b/src/compatibility/5.1/android-5.1-cdd.html
index 9b9ff55..6b46dbc 100644
--- a/src/compatibility/5.1/android-5.1-cdd.html
+++ b/src/compatibility/5.1/android-5.1-cdd.html
@@ -960,7 +960,7 @@
 build from the upstream Android Open Source Project for Android 5.1. This build
 includes a specific set of functionality and security fixes for the WebView [<a href="http://www.chromium.org/">Resources, 13</a>].</li>
   <li>The user agent string reported by the WebView MUST be in this format:
-<p>Mozilla/5.1 (Linux; Android $(VERSION); $(MODEL) Build/$(BUILD)$(WEBVIEW))
+<p>Mozilla/5.0 (Linux; Android $(VERSION); $(MODEL) Build/$(BUILD)$(WEBVIEW))
 AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 $(CHROMIUM_VER) Mobile
 Safari/537.36</p>
   <ul>