diff --git a/types.txt b/types.txt
index c48ef1d0ff..7e74a06441 100644
--- a/types.txt
+++ b/types.txt
@@ -1,6 +1,7 @@
 L Size
 B Boolean
 P ConstStr255Param
+P Str255 
 W CharParameter
 W OSErr
 W UInt16