diff --git a/indra/llcommon/linden_common.h b/indra/llcommon/linden_common.h
index 9adf24a492677a8d805af3653145db92b98140dc..8687a246558253248db47bed75f113930b87f137 100644
--- a/indra/llcommon/linden_common.h
+++ b/indra/llcommon/linden_common.h
@@ -87,7 +87,8 @@
 #include "lldefs.h"
 #include "llerror.h"
 #include "llextendedstatus.h"
-#include "llfasttimer.h"
+// Don't do this, adds 15K lines of header code to every library file.
+//#include "llfasttimer.h"
 #include "llfile.h"
 #include "llformat.h"