diff --git a/pkg/shsh/token.go b/pkg/shsh/token.go
index 3438006..d4c3e99 100644
--- a/pkg/shsh/token.go
+++ b/pkg/shsh/token.go
@@ -9,7 +9,9 @@ type operation func(Token) Token
 
 /*
  * LIST: a list of elements
- * OPERAND: an element which is 
+ * OPERAND: a string or number
+ * OPERATOR: an entry in a symtable
+ * OPERATION: a list starting with an operator
  */
 type parse_tag enum {
     LIST_T      iota