diff --git a/lang/lex.c b/lang/lex.c
index a4d2566..3aaf2de 100644
--- a/lang/lex.c
+++ b/lang/lex.c
@@ -874,6 +874,7 @@ static enum ivy_status read_number(struct ivy_lexer *lex)
 		char s[] = {c, 0};
 		b_string_append_cstr(str, s);
 		advance(lex);
+		token_len++;
 	}
 
 	if (token_len == 1 && base == 7) {