diff --git a/doc/ck_hs_set b/doc/ck_hs_set
index 625ddb2..5d8445e 100644
--- a/doc/ck_hs_set
+++ b/doc/ck_hs_set
@@ -45,7 +45,7 @@ argument in the hash set pointed to by the
 argument. The key specified by
 .Fa key
 is expected to have the hash value specified by the
-.Fa h
+.Fa hash
 argument (which was previously generated using the
 .Xr CK_HS_HASH 3
 macro).