diff --git a/QUERY-SPEC.md b/QUERY-SPEC.md
index 114a75c..bd6a802 100644
--- a/QUERY-SPEC.md
+++ b/QUERY-SPEC.md
@@ -110,8 +110,9 @@ what they expand to.
 
 ```
 query-str := $bom? query
-query := selector q-ws* "||" q-ws* query | selector
-selector := filter q-ws* selector-operator q-ws* selector | filter
+query := selector-start q-ws* "||" q-ws* query | selector-start
+selector-start := filter q-ws* selector-operator q-ws* selector | filter
+selector := matchers q-ws* selector-operator q-ws* selector | matchers
 selector-operator := ">>" | ">" | "++" | "+"
 filter := "top(" q-ws* ")" | matchers
 matchers := type-matcher $string? accessor-matcher* | $string accessor-matcher* | accessor-matcher+