--- src/webkit/glue/user_agent.cc
+++ src/webkit/glue/user_agent.cc
@@ -103,6 +103,7 @@ void BuildUserAgent(bool mimic_chrome1,
   StringAppendF(
       result,
       "Mozilla/5.0 (%s; %c; %s; %s) AppleWebKit/%d.%d"
+      " Vine/RPM_VERSION"
       " (KHTML, like Gecko) %s Safari/%d.%d",
       mimic_windows ? "Windows" : kUserAgentPlatform,
       kUserAgentSecurity,
