Index: head/ObsoleteFiles.inc
===================================================================
--- head/ObsoleteFiles.inc
+++ head/ObsoleteFiles.inc
@@ -36,6 +36,10 @@
 #   xargs -n1 | sort | uniq -d;
 # done
 
+# 20200528: libevent renamed libevent1
+OLD_FILES+=usr/include/private/event/event.h
+OLD_DIRS+=usr/include/private/event
+
 # 20200523: new clang import which bumps version from 10.0.0 to 10.0.1.s
 OLD_FILES+=usr/lib/clang/10.0.0/include/cuda_wrappers/algorithm
 OLD_FILES+=usr/lib/clang/10.0.0/include/cuda_wrappers/complex
Index: head/etc/mtree/BSD.usr.dist
===================================================================
--- head/etc/mtree/BSD.usr.dist
+++ head/etc/mtree/BSD.usr.dist
@@ -11,7 +11,7 @@
         private
             bsdstat
             ..
-            event
+            event1
             ..
             gmock
                 internal
Index: head/lib/Makefile
===================================================================
--- head/lib/Makefile
+++ head/lib/Makefile
@@ -48,7 +48,7 @@
 	libdwarf \
 	libedit \
 	libelftc \
-	libevent \
+	libevent1 \
 	libexecinfo \
 	libexpat \
 	libfetch \
Index: head/lib/libevent/Makefile
===================================================================
--- head/lib/libevent/Makefile
+++ head/lib/libevent/Makefile
@@ -1,31 +0,0 @@
-# $FreeBSD$
-
-PACKAGE=lib${LIB}
-.PATH:	${SRCTOP}/contrib/pf/libevent
-
-.include <src.opts.mk>
-
-LIB=		event
-SHLIB_MAJOR=	1
-PRIVATELIB=
-
-SRCS=	buffer.c evbuffer.c event.c kqueue.c log.c poll.c select.c signal.c
-INCS=	event.h
-
-CFLAGS+= -I${.CURDIR} \
-	-DHAVE_CLOCK_GETTIME \
-	-DHAVE_FCNTL_H \
-	-DHAVE_POLL \
-	-DHAVE_SELECT \
-	-DHAVE_SETFD \
-	-DHAVE_STDARG_H \
-	-DHAVE_SYS_IOCTL_H \
-	-DHAVE_SYS_TIME_H \
-	-DHAVE_UNISTD_H \
-	-DHAVE_VASPRINTF \
-	-DHAVE_WORKING_KQUEUE \
-	-DVERSION='"1.3b"'
-
-WARNS?=	2
-
-.include <bsd.lib.mk>
Index: head/lib/libevent/Makefile.depend
===================================================================
--- head/lib/libevent/Makefile.depend
+++ head/lib/libevent/Makefile.depend
@@ -1,16 +0,0 @@
-# $FreeBSD$
-# Autogenerated - do NOT edit!
-
-DIRDEPS = \
-	include \
-	include/xlocale \
-	lib/${CSU_DIR} \
-	lib/libc \
-	lib/libcompiler_rt \
-
-
-.include <dirdeps.mk>
-
-.if ${DEP_RELDIR} == ${_DEP_RELDIR}
-# local dependencies - needed for -jN in clean tree
-.endif
Index: head/lib/libevent1/Makefile
===================================================================
--- head/lib/libevent1/Makefile
+++ head/lib/libevent1/Makefile
@@ -0,0 +1,31 @@
+# $FreeBSD$
+
+PACKAGE=lib${LIB}
+.PATH:	${SRCTOP}/contrib/pf/libevent
+
+.include <src.opts.mk>
+
+LIB=		event1
+SHLIB_MAJOR=	1
+PRIVATELIB=
+
+SRCS=	buffer.c evbuffer.c event.c kqueue.c log.c poll.c select.c signal.c
+INCS=	event.h
+
+CFLAGS+= -I${.CURDIR} \
+	-DHAVE_CLOCK_GETTIME \
+	-DHAVE_FCNTL_H \
+	-DHAVE_POLL \
+	-DHAVE_SELECT \
+	-DHAVE_SETFD \
+	-DHAVE_STDARG_H \
+	-DHAVE_SYS_IOCTL_H \
+	-DHAVE_SYS_TIME_H \
+	-DHAVE_UNISTD_H \
+	-DHAVE_VASPRINTF \
+	-DHAVE_WORKING_KQUEUE \
+	-DVERSION='"1.3b"'
+
+WARNS?=	2
+
+.include <bsd.lib.mk>
Index: head/lib/libevent1/Makefile.depend
===================================================================
--- head/lib/libevent1/Makefile.depend
+++ head/lib/libevent1/Makefile.depend
@@ -0,0 +1,16 @@
+# $FreeBSD$
+# Autogenerated - do NOT edit!
+
+DIRDEPS = \
+	include \
+	include/xlocale \
+	lib/${CSU_DIR} \
+	lib/libc \
+	lib/libcompiler_rt \
+
+
+.include <dirdeps.mk>
+
+.if ${DEP_RELDIR} == ${_DEP_RELDIR}
+# local dependencies - needed for -jN in clean tree
+.endif
Index: head/share/mk/src.libnames.mk
===================================================================
--- head/share/mk/src.libnames.mk
+++ head/share/mk/src.libnames.mk
@@ -18,7 +18,7 @@
 		auditd \
 		bsdstat \
 		devdctl \
-		event \
+		event1 \
 		gmock \
 		gtest \
 		gmock_main \
Index: head/usr.sbin/ftp-proxy/Makefile
===================================================================
--- head/usr.sbin/ftp-proxy/Makefile
+++ head/usr.sbin/ftp-proxy/Makefile
@@ -9,7 +9,7 @@
 
 CFLAGS+=-I${SRCTOP}/contrib/pf/libevent
 
-LIBADD=	event
+LIBADD=	event1
 
 WARNS?=	3
 
Index: head/usr.sbin/ypldap/Makefile
===================================================================
--- head/usr.sbin/ypldap/Makefile
+++ head/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