1 files changed, 1 insertions, 0 deletions
diff --git a/docs/Lexer b/docs/Lexer
index 8f8e1ea..e945f9b 100644
--- a/docs/Lexer
+++ b/docs/Lexer
@@ -10,6 +10,7 @@ First sets
 IDENT 		[a-zA-Z] | '-' | '_' | [^#x0-#x7F] | '\'
 ATKEYWORD	'@'
 STRING		'"' | "'"
+INVALID_STRING	'"' | "'"
 HASH		'#'
 NUMBER		[0-9] | '.'
 PERCENTAGE	[0-9] | '.'