diff --git a/test-tc.1 b/test-tc.1
index 45e2bc8..759b71e 100644
--- a/test-tc.1
+++ b/test-tc.1
@@ -6,7 +6,7 @@
 
 
 .SH SYNOPSIS
-test-tc.py [symtbl] [debug] [litvars] cfgfile, cfgfile, ...
+test-tc.py [symtbl] [nonew] [debug] [litvars] cfgfile, cfgfile, ...
 
 .SH OPTIONS
 .TP
@@ -18,6 +18,16 @@
 pre-define any symbols.
 
 .TP
+.B nonew
+
+This option tells \'tconfpy\' to disallow the creation of
+new variable in the configuration file.  The user is limited
+to referencing and modifying only those variables already
+present in the symbol table.  Typically used when passing
+an initial symbol table to the parser to limit the user
+to only those variables.
+
+.TP
 .B debug
 
 This option causes the test driver to invoke \'tconfpy\' with