diff --git a/basis/struct-vectors/struct-vectors.factor b/basis/struct-vectors/struct-vectors.factor
index 252a46d640..974fa1d452 100644
--- a/basis/struct-vectors/struct-vectors.factor
+++ b/basis/struct-vectors/struct-vectors.factor
@@ -13,11 +13,11 @@ TUPLE: struct-vector
     [ <struct-array> 0 ] keep struct-vector boa ; inline
 
 M: struct-vector new-sequence
-    [ c-type>> <struct-array> ] [ [ >fixnum ] [ c-type>> ] bi ] 2bi
+    [ c-type>> <struct-array> ] [ [ >fixnum ] [ c-type>> ] bi* ] 2bi
     struct-vector boa ;
 
 M: struct-vector contract 2drop ;
 
 M: struct-array new-resizable c-type>> <struct-vector> ;
 
-INSTANCE: struct-vector growable
\ No newline at end of file
+INSTANCE: struct-vector growable