diff --git a/extra/sequences/extras/extras.factor b/extra/sequences/extras/extras.factor
index 815bb22b10..cdf17796b4 100644
--- a/extra/sequences/extras/extras.factor
+++ b/extra/sequences/extras/extras.factor
@@ -445,16 +445,16 @@ PRIVATE>
 : last? ( ... seq quot: ( ... elt -- ... ? ) -- ... ? ) [ last ] dip call ; inline
 : nth? ( ... n seq quot: ( ... elt -- ... ? ) -- ... ? ) [ nth ] dip call ; inline
 
-: loop>sequence ( quot: ( -- obj/f ) exemplar -- seq )
+: loop>sequence ( quot: ( ..a -- ..a obj/f ) exemplar -- seq )
    [ '[ [ @ [ [ , ] when* ] keep ] loop ] ] dip make ; inline
 
-: loop>array ( quot: ( -- obj/f ) -- seq )
+: loop>array ( quot: ( ..a -- ..a obj/f ) -- seq )
    { } loop>sequence ; inline
 
-: loop>sequence* ( quot: ( -- obj ? ) exemplar -- seq )
+: loop>sequence* ( quot: ( ..a -- ..a obj ? ) exemplar -- seq )
     [ '[ [ @ [ [ , ] when* ] [ ] bi* ] loop ] ] dip make ; inline
 
-: loop>array* ( quot: ( -- obj ? ) -- seq )
+: loop>array* ( quot: ( ..a -- ..a obj ? ) -- seq )
    { } loop>sequence* ; inline
 
 <PRIVATE