diff --git a/src/util/set/_impl/_hashset_add_impl.scad b/src/util/set/_impl/_hashset_add_impl.scad
index 25e1ca28..96e5e123 100644
--- a/src/util/set/_impl/_hashset_add_impl.scad
+++ b/src/util/set/_impl/_hashset_add_impl.scad
@@ -7,5 +7,12 @@ function _hashset_add(buckets, b_numbers, elem, eq, hash) =
 	)
 	_find_eq(bucket, elem, eq) != -1 ? buckets : _add(buckets, b_numbers, bucket, elem, idx);
 
+function _hashset_add_by(buckets, b_numbers, elem, eq, hash, f_eq) =
+    let(
+	    idx = hash(elem) % b_numbers,
+		bucket = buckets[idx]
+	)
+	f_eq(bucket, elem, eq) != -1 ? buckets : _add(buckets, b_numbers, bucket, elem, idx);
+
 function _add(buckets, b_numbers, bucket, elem, idx) = 
 	[for(i = 0; i < b_numbers; i = i + 1) i == idx ? [each bucket, elem] : buckets[i]];
\ No newline at end of file
diff --git a/src/util/set/_impl/_hashset_impl.scad b/src/util/set/_impl/_hashset_impl.scad
index 439b82e1..7d62fc33 100644
--- a/src/util/set/_impl/_hashset_impl.scad
+++ b/src/util/set/_impl/_hashset_impl.scad
@@ -1,15 +1,18 @@
 use <_hashset_add_impl.scad>;
 
+include <../../_impl/_find_eq_search_some.scad>;
+
 function _hashset(lt, leng, buckets, b_numbers, eq, hash) = 
     let(
         end = leng - 1,
+        f_eq = is_undef(eq) ? _find_eq_search : _find_eq_some,
         n_buckets_lt = [
-        for(i = 0, n_buckets = _hashset_add(buckets, b_numbers, lt[i], eq, hash), is_continue = i < end;
+        for(i = 0, n_buckets = _hashset_add_by(buckets, b_numbers, lt[i], eq, hash, f_eq), is_continue = i < end;
             is_continue; 
-            i = i + 1, is_continue = i < end, n_buckets = is_continue ? _hashset_add(n_buckets, b_numbers, lt[i], eq, hash) : undef) 
+            i = i + 1, is_continue = i < end, n_buckets = is_continue ? _hashset_add_by(n_buckets, b_numbers, lt[i], eq, hash, f_eq) : undef) 
             n_buckets
         ]
     )
-    _hashset_add(n_buckets_lt[end - 1], b_numbers, lt[end], eq, hash); 
+    _hashset_add_by(n_buckets_lt[end - 1], b_numbers, lt[end], eq, hash, f_eq);