"\platform{UNIX}" should really be spelled "\platform{Unix}".
diff --git a/Doc/lib/libcrypt.tex b/Doc/lib/libcrypt.tex
index 8006f04..f9d1615 100644
--- a/Doc/lib/libcrypt.tex
+++ b/Doc/lib/libcrypt.tex
@@ -2,7 +2,7 @@
          Function used to check \UNIX{} passwords}
 
 \declaremodule{builtin}{crypt}
-  \platform{UNIX}
+  \platform{Unix}
 \modulesynopsis{The \cfunction{crypt()} function used to check \UNIX{}
   passwords.}
 \moduleauthor{Steven D. Majewski}{sdm7g@virginia.edu}