diff --git a/src/util/map/_impl/_hashmap_put_impl.scad b/src/util/map/_impl/_hashmap_put_impl.scad
index c5a9401a..5e12a7b9 100644
--- a/src/util/map/_impl/_hashmap_put_impl.scad
+++ b/src/util/map/_impl/_hashmap_put_impl.scad
@@ -11,11 +11,14 @@ function _hashmap_put(buckets, b_numbers, key, value, eq, hash) =
 	              _put(buckets, b_numbers, bucket, key, value, b_idx);
 
 function _replace(buckets, b_numbers, bucket, key, value, b_idx, k_idx) = 
-    let(
-	    leng_bucket = len(bucket),
-		n_bucket = [for(i = 0; i < leng_bucket; i = i + 1) i == k_idx ? [key, value] : bucket[i]]
-	)
-	[for(i = 0; i < b_numbers; i = i + 1) i == b_idx ? n_bucket : buckets[i]];
+    let(leng_bucket = len(bucket))
+	[
+		for(bi = 0; bi < b_numbers; bi = bi + 1) 
+		if(bi == b_idx) 
+		    [for(ki = 0; ki < leng_bucket; ki = ki + 1) ki == k_idx ? [key, value] : bucket[ki]] 
+		else 
+		    buckets[bi]
+	];
 
 function _put(buckets, b_numbers, bucket, key, value, b_idx) = 
     [for(i = 0; i < b_numbers; i = i + 1) i == b_idx ? [each bucket, [key, value]] : buckets[i]];
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