diff --git a/ptp4l.8 b/ptp4l.8
index 6c2cf03..0ab2e23 100644
--- a/ptp4l.8
+++ b/ptp4l.8
@@ -356,7 +356,7 @@ proportional constant will be set by the following formula from the current
 sync interval.
 The default is 0.0.
 
-kp = min(kp_scale * sync^kp_exponent, kp_norm_max / sync))
+kp = min(kp_scale * sync^kp_exponent, kp_norm_max / sync)
 .TP
 .B pi_integral_const
 The integral constant of the PI controller. When set to 0.0, the