diff --git a/src/noise/_impl/_nz_cell_impl.scad b/src/noise/_impl/_nz_cell_impl.scad
index f9bec4f4..f2788126 100644
--- a/src/noise/_impl/_nz_cell_impl.scad
+++ b/src/noise/_impl/_nz_cell_impl.scad
@@ -23,7 +23,7 @@ function _nz_cell_border(cells, p) =
             [each cell, norm(cell - p)]
         ],
         idx = len(cells[0]),
-        sorted_dists = sorted(dists, cmp = function(a, b) a[idx] - b[idx]),
+        sorted_dists = sorted(dists, key = function(elem) elem[idx]),
         sorted0 = sorted_dists[0],
         sorted1 = sorted_dists[1],
         a = [for(i = [0:idx - 1]) sorted0[i]],
diff --git a/src/noise/_impl/_nz_worley2_impl.scad b/src/noise/_impl/_nz_worley2_impl.scad
index 27e32a09..4d57ef67 100644
--- a/src/noise/_impl/_nz_worley2_impl.scad
+++ b/src/noise/_impl/_nz_worley2_impl.scad
@@ -1,7 +1,7 @@
 use <_nz_worley_comm.scad>;
 use <../../util/sorted.scad>;
 
-_cmp = function(a, b) a[2] - b[2];
+_key = function(elem) elem[2];
 
 function _neighbors(fcord, seed, grid_w) = 
     let(range = [-1:1])
@@ -25,7 +25,7 @@ function _nz_worley2_classic(p, nbrs, dist) =
                 dist == "chebyshev" ? [for(nbr = nbrs) [each nbr, _chebyshev(nbr, p)]] : 
                                assert("Unknown distance option")
     )
-    sorted(cells, _cmp)[0];
+    sorted(cells, key = _key)[0];
 
 function _nz_worley2_border(p, nbrs) = 
     let(
@@ -33,7 +33,7 @@ function _nz_worley2_border(p, nbrs) =
             for(nbr = nbrs) 
                 [each nbr, norm(nbr - p)]
         ],
-        sorted_cells = sorted(cells, _cmp),
+        sorted_cells = sorted(cells, key = _key),
         a = [sorted_cells[0].x, sorted_cells[0].y],
         m = (a + [sorted_cells[1].x, sorted_cells[1].y]) / 2
     )
diff --git a/src/noise/_impl/_nz_worley3_impl.scad b/src/noise/_impl/_nz_worley3_impl.scad
index 548b9257..77ec6352 100644
--- a/src/noise/_impl/_nz_worley3_impl.scad
+++ b/src/noise/_impl/_nz_worley3_impl.scad
@@ -1,7 +1,7 @@
 use <_nz_worley_comm.scad>;
 use <../../util/sorted.scad>;
 
-_cmp = function(a, b) a[3] - b[3];
+_key = function(elem) elem[3];
 
 function _neighbors(fcord, seed, grid_w) = 
     let(range = [-1:1])
@@ -27,7 +27,7 @@ function _nz_worley3_classic(p, nbrs, dist) =
                 dist == "chebyshev" ? [for(nbr = nbrs) [each nbr, _chebyshev(nbr, p)]] : 
                                assert("Unknown distance option")   
     )
-    sorted(cells, _cmp)[0];
+    sorted(cells, key = _key)[0];
 
 function _nz_worley3_border(p, nbrs) = 
     let(
@@ -35,7 +35,7 @@ function _nz_worley3_border(p, nbrs) =
             for(nbr = nbrs) 
                 [each nbr, norm(nbr - p)]
         ],
-        sorted_cells = sorted(cells, _cmp),
+        sorted_cells = sorted(cells, key = _key),
         a = [sorted_cells[0].x, sorted_cells[0].y, sorted_cells[0].z],
         m = (a + [sorted_cells[1].x, sorted_cells[1].y, sorted_cells[1].z]) / 2        
     )