1 files changed, 4 insertions, 0 deletions
diff --git a/lex.go b/lex.go
index 6b76953..7450888 100644
--- a/lex.go
+++ b/lex.go
@@ -296,6 +296,10 @@ func addKeywordOrIdentifier(name string, line int) token {
 		return token{kind: function, line: line}
 	case "return":
 		return token{kind: ret, line: line}
+	case "const":
+		return token{kind: constKeyword, line: line}
+	case "mut":
+		return token{kind: mut, line: line}
 	default:
 		return token{kind: identifier, value: name, line: line}
 	}