diff --git a/Makefile b/Makefile
index 26a37bcadef2..653d7f608bb3 100644
--- a/Makefile
+++ b/Makefile
@@ -37,7 +37,7 @@
 # 	_jflag=`sysctl -n hw.ncpu`
 # 	_jflag=$(($_jflag * 2))
 # 	[ $_jflag -gt 12 ] && _jflag=12
-# 	make universe -DMAKE_JUST_KERNELS JFLAG=${jflag}
+# 	make universe -DMAKE_JUST_KERNELS JFLAG=-j${_jflag}
 #
 # This makefile is simple by design. The FreeBSD make automatically reads
 # the /usr/share/mk/sys.mk unless the -m argument is specified on the