diff --git a/indra/llcommon/lleventapi.h b/indra/llcommon/lleventapi.h
index fef12988cb41870d17c8efb52a5ccdfb5bd5ed8f..2cd3b5bf8975abbe52c0375e91eb27820ae28657 100644
--- a/indra/llcommon/lleventapi.h
+++ b/indra/llcommon/lleventapi.h
@@ -23,7 +23,7 @@
  * from LLDispatchListener -- it also gives us event API introspection.
  * Deriving from LLInstanceTracker lets us enumerate instances.
  */
-class LLEventAPI: public LLDispatchListener,
+class LL_COMMON_API LLEventAPI: public LLDispatchListener,
                   public LLInstanceTracker<LLEventAPI, std::string>
 {
     typedef LLDispatchListener lbase;