diff --git a/rumur/doc/rumur.1 b/rumur/doc/rumur.1
index 11e96960..bef5a313 100644
--- a/rumur/doc/rumur.1
+++ b/rumur/doc/rumur.1
@@ -129,7 +129,7 @@ result in the set only expanding when completely full. This may sound ideal, but
 will actually result in a much longer runtime.
 .RE
 .PP
-\fB--symmetry-reduction\fR [\fBoff\fR | \fBheuristic\fR | \fBexhaustive\fR ]
+\fB--symmetry-reduction\fR [\fBoff\fR | \fBheuristic\fR | \fBexhaustive\fR]
 .RS
 Enable or disable symmetry reduction. Symmetry reduction is an optimisation that
 decreases the state space that must be searched by deriving a canonical