diff --git a/external/gpl3/gcc/lib/libtsan/Makefile b/external/gpl3/gcc/lib/libtsan/Makefile
index a579472ab79d..eff361564e55 100644
--- a/external/gpl3/gcc/lib/libtsan/Makefile
+++ b/external/gpl3/gcc/lib/libtsan/Makefile
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.5 2016/06/05 20:08:26 christos Exp $
+# $NetBSD: Makefile,v 1.6 2018/01/09 01:51:20 christos Exp $
 
 .include <bsd.own.mk>
 
@@ -25,6 +25,7 @@ tsan_platform_linux.o \
 tsan_platform_mac.o \
 tsan_platform_windows.o \
 tsan_report.o \
+tsan_rtl_amd64.o \
 tsan_rtl.o \
 tsan_rtl_mutex.o \
 tsan_rtl_report.o \