diff --git a/share/man/man9/PCBGROUPS.9 b/share/man/man9/PCBGROUPS.9
index cb1ab036ece..098c632464a 100644
--- a/share/man/man9/PCBGROUPS.9
+++ b/share/man/man9/PCBGROUPS.9
@@ -202,7 +202,7 @@ receive path in
 .Xr RSS 9
 .Sh HISTORY
 PCBGROUPS first appeared in
-.Fx 9.0.
+.Fx 9.0 .
 .Pp
 The PCBGROUPS implementation is inspired by Willman, Rixner, and Cox's
 2006 USENIX paper,