diff --git a/indra/llcommon/CMakeLists.txt b/indra/llcommon/CMakeLists.txt
index 2a036df06e..858e483036 100644
--- a/indra/llcommon/CMakeLists.txt
+++ b/indra/llcommon/CMakeLists.txt
@@ -157,6 +157,7 @@ set(llcommon_HEADER_FILES
     lleventemitter.h
     llextendedstatus.h
     llfasttimer.h
+    llfasttimer_class.h
     llfile.h
     llfindlocale.h
     llfixedbuffer.h