Index: ObsoleteFiles.inc
===================================================================
--- ObsoleteFiles.inc
+++ ObsoleteFiles.inc
@@ -1099,6 +1099,9 @@
 OLD_LIBS+=usr/lib32/libsureware.so
 OLD_LIBS+=usr/lib32/libubsec.so
 OLD_LIBS+=usr/lib32/libssl.so.8
+# 201809xx: libevent renamed libevent1
+OLD_FILES+=usr/include/private/event/event.h
+OLD_DIRS+=usr/include/private/event
 # 20180824: libbe(3) SHLIBDIR fixed to reflect correct location
 OLD_LIBS+=usr/lib/libbe.so.1
 # 20180819: Remove deprecated arc4random(3) stir/addrandom interfaces
Index: etc/mtree/BSD.usr.dist
===================================================================
--- etc/mtree/BSD.usr.dist
+++ etc/mtree/BSD.usr.dist
@@ -11,7 +11,7 @@
         private
             bsdstat
             ..
-            event
+            event1
             ..
             gmock
                 internal
Index: lib/Makefile
===================================================================
--- lib/Makefile
+++ lib/Makefile
@@ -46,7 +46,7 @@
 	libdwarf \
 	libedit \
 	libelftc \
-	libevent \
+	libevent1 \
 	libexecinfo \
 	libexpat \
 	libfetch \
Index: lib/libevent1/Makefile
===================================================================
--- lib/libevent1/Makefile
+++ lib/libevent1/Makefile
@@ -5,7 +5,7 @@
 
 .include <src.opts.mk>
 
-LIB=		event
+LIB=		event1
 SHLIB_MAJOR=	1
 PRIVATELIB=
 
Index: share/mk/src.libnames.mk
===================================================================
--- share/mk/src.libnames.mk
+++ share/mk/src.libnames.mk
@@ -17,7 +17,7 @@
 		atf_cxx \
 		bsdstat \
 		devdctl \
-		event \
+		event1 \
 		gmock \
 		gtest \
 		gmock_main \
Index: usr.sbin/ftp-proxy/Makefile
===================================================================
--- usr.sbin/ftp-proxy/Makefile
+++ usr.sbin/ftp-proxy/Makefile
@@ -9,7 +9,7 @@
 
 CFLAGS+=-I${SRCTOP}/contrib/pf/libevent
 
-LIBADD=	event
+LIBADD=	event1
 
 WARNS?=	3
 
Index: usr.sbin/ypldap/Makefile
===================================================================
--- usr.sbin/ypldap/Makefile
+++ usr.sbin/ypldap/Makefile
@@ -9,7 +9,7 @@
 
 MAN=		ypldap.8 ypldap.conf.5
 
-LIBADD=		openbsd event util rpcsvc
+LIBADD=		openbsd event1 util rpcsvc
 
 CFLAGS+=-I${.CURDIR}
 CFLAGS+=-I${SRCTOP}/contrib/pf/libevent