diff --git a/sbin/mdconfig/mdconfig.8 b/sbin/mdconfig/mdconfig.8
index 0288474fec13..5998de5497bb 100644
--- a/sbin/mdconfig/mdconfig.8
+++ b/sbin/mdconfig/mdconfig.8
@@ -58,7 +58,7 @@
 .Op Fl S Ar sectorsize
 .Op Fl u Ar unit
 .Op Fl x Ar sectors/track
-.Op Fl y Ar heads/cyl
+.Op Fl y Ar heads/cylinder
 .Nm
 .Fl d
 .Fl u Ar unit
diff --git a/sbin/mdconfig/mdconfig.c b/sbin/mdconfig/mdconfig.c
index a5644848a4d9..2217c6c4c0d4 100644
--- a/sbin/mdconfig/mdconfig.c
+++ b/sbin/mdconfig/mdconfig.c
@@ -57,7 +57,7 @@ usage(void)
 	fprintf(stderr,
 "usage: mdconfig -a -t type [-n] [-o [no]option] ... [-f file]\n"
 "                [-s size] [-S sectorsize] [-u unit]\n"
-"                [-x sectors/track] [-y heads/cyl]\n"
+"                [-x sectors/track] [-y heads/cylinder]\n"
 "       mdconfig -d -u unit [-o [no]force]\n"
 "       mdconfig -l [-v] [-n] [-u unit]\n");
 	fprintf(stderr, "\t\ttype = {malloc, preload, vnode, swap}\n");