diff --git a/indra/llcommon/lleventapi.h b/indra/llcommon/lleventapi.h
index 332dee9550bbd7bac110e10888aa2d3c075fb1b6..64d038ade41a14140c8ee899265db47fabda47a7 100644
--- a/indra/llcommon/lleventapi.h
+++ b/indra/llcommon/lleventapi.h
@@ -95,7 +95,7 @@ class LL_COMMON_API LLEventAPI: public LLDispatchListener,
      * }
      * @endcode
      */
-    class Response
+    class LL_COMMON_API Response
     {
     public:
         /**