"\platform{UNIX}" should really be spelled "\platform{Unix}".
diff --git a/Doc/lib/libsyslog.tex b/Doc/lib/libsyslog.tex
index a0bdd45..6f58287 100644
--- a/Doc/lib/libsyslog.tex
+++ b/Doc/lib/libsyslog.tex
@@ -2,7 +2,7 @@
          \UNIX{} syslog library routines}
 
 \declaremodule{builtin}{syslog}
-  \platform{UNIX}
+  \platform{Unix}
 \modulesynopsis{An interface to the \UNIX{} syslog library routines.}