diff --git a/plan9/plan9port/Makefile b/plan9/plan9port/Makefile
index 895cac146b7..10d439a6a4c 100644
--- a/plan9/plan9port/Makefile
+++ b/plan9/plan9port/Makefile
@@ -1,4 +1,5 @@
 ONLY_FOR_ARCHS =	aarch64 amd64 i386 powerpc powerpc64
+BROKEN-aarch64 =	random build failures
 
 COMMENT =		Plan 9 from user space