diff --git a/grammar.js b/grammar.js
index d0435a2..1368a95 100644
--- a/grammar.js
+++ b/grammar.js
@@ -10,15 +10,15 @@ const PREC = {
   BITWISE_AND: 5,
   EQUAL: 6,
   RELATIONAL: 7,
-  SIZEOF: 8,
   SHIFT: 9,
   ADD: 10,
   MULTIPLY: 11,
   CAST: 12,
-  UNARY: 13,
-  CALL: 14,
-  FIELD: 15,
-  SUBSCRIPT: 16
+  SIZEOF: 13,
+  UNARY: 14,
+  CALL: 15,
+  FIELD: 16,
+  SUBSCRIPT: 17
 };
 
 module.exports = grammar({