diff --git a/grammar b/grammar
index ef9e95a..b6a7360 160000
--- a/grammar
+++ b/grammar
@@ -1 +1 @@
-Subproject commit ef9e95ab7999d36d483569aa98598a3b7d5e289c
+Subproject commit b6a73607fda86cc0ecb4273c8ef862a647e7a8cc