diff --git a/extra/peg/ebnf/ebnf.factor b/extra/peg/ebnf/ebnf.factor
index 5343bb513b..520bf82c32 100644
--- a/extra/peg/ebnf/ebnf.factor
+++ b/extra/peg/ebnf/ebnf.factor
@@ -99,7 +99,7 @@ M: ebnf (generate-parser) ( ast -- id )
 DEFER: 'rhs'
 
 : 'non-terminal' ( -- parser )
-  CHAR: a CHAR: z range repeat1 [ >string <ebnf-non-terminal> ] action ;
+  CHAR: a CHAR: z range "-" token [ first ] action  2array choice repeat1 [ >string <ebnf-non-terminal> ] action ;
 
 : 'terminal' ( -- parser )
   "'" token hide [ CHAR: ' = not ] satisfy repeat1 "'" token hide 3array seq [ first >string <ebnf-terminal> ] action ;