diff --git a/share/minizinc/linear/redefinitions.mzn b/share/minizinc/linear/redefinitions.mzn
index d50606f00..83fff4f5c 100644
--- a/share/minizinc/linear/redefinitions.mzn
+++ b/share/minizinc/linear/redefinitions.mzn
@@ -676,9 +676,8 @@ function var 0..1: fVarInBigSetOfInt(var int: x, set of int: s)
 %-----------------------------------------------------------------------------%
 %-----------------------------------------------------------------------------%
 
-annotation bool_search(array[$X] of var bool: x, ann:a1, ann:a2, ann:a3) =
-  let { array[int] of var bool: xx = array1d(x) } in 
-  int_search([bool2int(xx[i]) | i in index_set(xx)],a1,a2,a3);
+annotation bool_search(array[int] of var bool: x, ann: a1, ann: a2, ann: a3) =
+  int_search([bool2int(x_i) | x_i in x], a1, a2, a3);
 
 annotation warm_start( array[int] of var bool: x, array[int] of bool: v ) =
    warm_start( [ bool2int(x[i]) | i in index_set(x) ], [ bool2int(v[i]) | i in index_set(v) ] );