diff --git a/man/ruby.1 b/man/ruby.1
index c9a0bdc5aa..92c14a009f 100644
--- a/man/ruby.1
+++ b/man/ruby.1
@@ -16,7 +16,7 @@
 .Op Fl E Ar external Ns Op : Ns Ar internal
 .Op Fl F Ns Ar pattern
 .Op Fl I Ar directory
-.Op Fl K Ar c
+.Op Fl K Ns Ar c
 .Op Fl T Ns Op Ar level
 .Op Fl W Ns Op Ar level
 .Op Fl e Ar command