diff --git a/man4/st.4 b/man4/st.4
index c8cc202d2..9858f4f54 100644
--- a/man4/st.4
+++ b/man4/st.4
@@ -42,10 +42,10 @@ The
 .B st
 driver uses major device number 9.
 .PP
-Each device uses eight minor device numbers. The lower-most five bits
+Each device uses eight minor device numbers. The lowermost five bits
 in the minor numbers are assigned sequentially in the order of
-detection. In the 2.6 kernel, the bits above the eight lower-most bits are
-concatenated to the five lower-most bits to form the tape number.
+detection. In the 2.6 kernel, the bits above the eight lowermost bits are
+concatenated to the five lowermost bits to form the tape number.
 The minor numbers can be grouped into
 two sets of four numbers: the principal (auto-rewind) minor device numbers,
 .IR n ,