diff --git a/man3/lockf.3 b/man3/lockf.3
index 99ab72b40..f902edd19 100644
--- a/man3/lockf.3
+++ b/man3/lockf.3
@@ -147,7 +147,7 @@ and this lock operation would cause a deadlock.
 .TP
 .B EINVAL
 An invalid operation was specified in
-.IR fd .
+.IR cmd .
 .TP
 .B ENOLCK
 Too many segment locks open, lock table is full.