diff --git a/core/vocabs/vocabs-docs.factor b/core/vocabs/vocabs-docs.factor
index 021c56e22d..da40fdc3b9 100644
--- a/core/vocabs/vocabs-docs.factor
+++ b/core/vocabs/vocabs-docs.factor
@@ -28,7 +28,6 @@ $nl
 { $subsections
     vocab
     child-vocabs
-    parent-vocabs
     create-vocab
 }
 "Getting words from a vocabulary:"
@@ -98,16 +97,6 @@ HELP: child-vocabs
     }
 } ;
 
-HELP: parent-vocabs
-{ $values { "vocab" "a vocabulary specifier" } { "seq" "a sequence of strings" } }
-{ $description "Outputs all vocabularies which are conceptually above " { $snippet "vocab" } " in the hierarchy." }
-{ $examples
-    { $unchecked-example
-        "\"io.files.info\" parent-vocabs ."
-        "{ \"io\" \"io.files\" \"io.files.info\" }"
-    }
-} ;
-
 HELP: vocab-link
 { $class-description "Instances of this class identify vocabularies which are potentially not loaded. The " { $link vocab-name } " slot is the vocabulary name."
 $nl