diff --git a/GUI/xephem/xephem.1 b/GUI/xephem/xephem.1
index 28c1bd0..781561a 100644
--- a/GUI/xephem/xephem.1
+++ b/GUI/xephem/xephem.1
@@ -1,4 +1,4 @@
-.TH XEphem 1X
+.TH XEphem 1X "" "2023-04-08" "XEphem User Manual"
 .SH Name
 XEphem \- an interactive astronomical ephemeris for X11
 .SH Syntax
@@ -157,6 +157,10 @@ Elwood C. Downey, email ecdowney@ClearSkyInstitute.com.
 
 .SH References
 .PP
+This is the open-source version of XEphem, released under the MIT
+license. The source code can be found at
+.I https://github.com/XEphem/XEphem
+.PP
 The Web homepage, including the FAQ, is maintained at
 .I http://www.clearskyinstitute.com/xephem
 .PP