diff --git a/basis/sequences/generalizations/generalizations-docs.factor b/basis/sequences/generalizations/generalizations-docs.factor
index 09e9cad940..6ec9d11176 100644
--- a/basis/sequences/generalizations/generalizations-docs.factor
+++ b/basis/sequences/generalizations/generalizations-docs.factor
@@ -115,7 +115,7 @@ HELP: nmap-reduce
 { $description "A generalization of " { $link map-reduce } " that can be applied to any number of sequences." } ;
 
 HELP: nall?
-{ $values { "seqs... " { $snippet "n" } " sequences on the datastack" } { "quot" { $quotation "( element... - ? )" } } { "n" integer } }
+{ $values { "seqs..." { $snippet "n" } " sequences on the datastack" } { "quot" { $quotation "( element... - ? )" } } { "n" integer } { "?" boolean } }
 { $description "A generalization of " { $link all? } " that can be applied to any number of sequences." } ;
 
 ARTICLE: "sequences.generalizations" "Generalized sequence words"
diff --git a/basis/sequences/generalizations/generalizations.factor b/basis/sequences/generalizations/generalizations.factor
index 3a1f8b2784..a722760fcf 100644
--- a/basis/sequences/generalizations/generalizations.factor
+++ b/basis/sequences/generalizations/generalizations.factor
@@ -122,5 +122,5 @@ MACRO: nmap-reduce ( map-quot reduce-quot n -- quot )
         _ _ (neach) (each-integer)
     ] ;
 
-: nall? ( seqs... quot n -- )
+: nall? ( seqs... quot n -- ? )
     (neach) all-integers? ; inline