diff --git a/doc/ck_cohort b/doc/ck_cohort
index d6f4edf..011ca1b 100644
--- a/doc/ck_cohort
+++ b/doc/ck_cohort
@@ -28,7 +28,7 @@
 .Dt ck_cohort 3
 .Sh NAME
 .Nm ck_cohort
-.Nd Generalized interface for lock cohorts
+.Nd generalized interface for lock cohorts
 .Sh LIBRARY
 Concurrency Kit (libck, \-lck)
 .Sh SYNOPSIS