diff --git a/Makefile.inc1 b/Makefile.inc1
index 12759c330fc9..3f37401b3823 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -784,6 +784,9 @@ buildenvvars: .PHONY
 BUILDENV_DIR?=	${.CURDIR}
 buildenv: .PHONY
 	@echo Entering world for ${TARGET_ARCH}:${TARGET}
+.if ${BUILDENV_SHELL:M*zsh*}
+	@echo For ZSH you must run: export CPUTYPE=${TARGET_CPUTYPE}
+.endif
 	@cd ${BUILDENV_DIR} && env ${WMAKEENV} BUILDENV=1 ${BUILDENV_SHELL} \
 	    || true