diff --git a/src/com/google/javascript/jscomp/webservice/common/Protocol.java b/src/com/google/javascript/jscomp/webservice/common/Protocol.java
index <HASH>..<HASH> 100644
--- a/src/com/google/javascript/jscomp/webservice/common/Protocol.java
+++ b/src/com/google/javascript/jscomp/webservice/common/Protocol.java
@@ -61,6 +61,7 @@ public class Protocol {
     BUILD_DEBUG("debug"),
     CHARSET("charset"),
     LANGUAGE("language"),
+    LANGUAGE_OUT("language_out"),
     USE_TYPES_FOR_OPTIMIZATIONS("use_types_for_optimization"),
     ANGULAR_PASS("angular_pass"),
     GENERATE_EXPORTS("generate_exports"),
Adds support for language_out to the Closure webservice. When unspecified, this takes the value of the input language.
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Created by MOE: <URL>