diff --git a/Makefile.pre.in b/Makefile.pre.in
index f8bcc92f090..53130309356 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -627,6 +627,7 @@ PLATMACDIRS= plat-mac plat-mac/Carbon plat-mac/lib-scriptpackages \
 	plat-mac/lib-scriptpackages/Finder \
 	plat-mac/lib-scriptpackages/Netscape \
 	plat-mac/lib-scriptpackages/StdSuites \
+	plat-mac/lib-scriptpackages/SystemEvents \
 	plat-mac/lib-scriptpackages/Terminal
 PLATMACPATH=:plat-mac:plat-mac/lib-scriptpackages
 LIBSUBDIRS=	lib-old lib-tk site-packages test test/output test/data \