diff --git a/src/util/set/hashset_del.scad b/src/util/set/hashset_del.scad
index 75d69d5a..08425953 100644
--- a/src/util/set/hashset_del.scad
+++ b/src/util/set/hashset_del.scad
@@ -14,15 +14,16 @@ use <../find_index.scad>;
 
 function hashset_del(set, elem, eq = function(e1, e2) e1 == e2, hash = function(e) _str_hash(e)) =
     let(
-	    bidx = hash(elem) % len(set),
+	    leng_set = len(set),
+	    bidx = hash(elem) % leng_set,
 		bucket = set[bidx],
-		leng = len(bucket)
+		leng_bucket = len(bucket)
 	)
-	leng == 0 ? set :
+	leng_bucket == 0 ? set :
 	let(i = find_index(bucket, function(e) eq(e, elem)))
 	i == -1 ? set : 
-	concat(
-	    slice(set, 0, bidx), 
-		[concat(slice(bucket, 0, i), slice(bucket, i + 1))],
-		slice(set, bidx + 1)
-	);
\ No newline at end of file
+	[
+	    for(j = 0; j < leng_set; j = j + 1) j == bidx ? 
+		    [for(k = 0; k < leng_bucket; k = k + 1) if(k != i) bucket[k]] : 
+			set[j]
+	];