diff --git a/genex/expand-pintype b/genex/expand-pintype
index 4e10cd6..8daf3bc 100755
--- a/genex/expand-pintype
+++ b/genex/expand-pintype
@@ -34,6 +34,7 @@ $NAME_WIDTH = 15;	# name field width in ASCII mode, in characters
 	"w" => "Pwr Out",
 	"C" => "OC",
 	"E" => "OE",
+	"N" => "NC",
 );
 
 if (@ARGV < 2) {