diff --git a/src/util/_impl/_sort_impl.scad b/src/util/_impl/_sort_impl.scad
index 051922b6..c6c1266c 100644
--- a/src/util/_impl/_sort_impl.scad
+++ b/src/util/_impl/_sort_impl.scad
@@ -1,6 +1,6 @@
 use <util/_impl/_vt_default_comparator.scad>;
 
-function _default_sort(lt) = 
+function _vt_sort(lt) = 
     let(leng = len(lt))
     leng <= 1 ? lt : 
         let(
@@ -8,9 +8,9 @@ function _default_sort(lt) =
             before = [for(j = 1; j < leng; j = j + 1) if(lessThan(lt[j], pivot)) lt[j]],
             after =  [for(j = 1; j < leng; j = j + 1) if(greaterThan(lt[j], pivot) || lt[j] == pivot) lt[j]]
         )
-        concat(_default_sort(before), [pivot], _default_sort(after));
+        concat(_vt_sort(before), [pivot], _vt_sort(after));
 
-function _sort(lt, i) = 
+function _sort_by_idx(lt, i) = 
     let(leng = len(lt))
     leng <= 1 ? lt : 
         let(
@@ -18,9 +18,9 @@ function _sort(lt, i) =
             before = [for(j = 1; j < leng; j = j + 1) if(lt[j][i] < pivot[i]) lt[j]],
             after =  [for(j = 1; j < leng; j = j + 1) if(lt[j][i] >= pivot[i]) lt[j]]
         )
-        concat(_sort(before, i), [pivot], _sort(after, i));
+        concat(_sort_by_idx(before, i), [pivot], _sort_by_idx(after, i));
 
-function _sort_impl(lt, by, idx) =
+function _sort_by(lt, by, idx) =
     let(
         dict = [["x", 0], ["y", 1], ["z", 2], ["i", idx]],
         i = dict[search(by == "idx" ? "i" : by, dict)[0]][1]
diff --git a/src/util/sort.scad b/src/util/sort.scad
index fb5ba7f0..8379ae58 100644
--- a/src/util/sort.scad
+++ b/src/util/sort.scad
@@ -11,5 +11,5 @@
 use <util/_impl/_sort_impl.scad>;
 
 function sort(lt, by = "idx", idx = 0) = 
-    by == "vt" ? _default_sort(lt) :      // for example, sort by zyx for a list of points
-                 _sort_impl(lt, by, idx);
\ No newline at end of file
+    by == "vt" ? _vt_sort(lt) :      // for example, sort by zyx for a list of points
+                 _sort_by(lt, by, idx);
\ No newline at end of file