diff --git a/src/__comm__/_str_hash.scad b/src/__comm__/_str_hash.scad
new file mode 100644
index 00000000..3ad6c64b
--- /dev/null
+++ b/src/__comm__/_str_hash.scad
@@ -0,0 +1,11 @@
+use <../util/sum.scad>;
+
+function _str_hash(value) = 
+    let(
+	    s = str(value),
+		leng = len(s)
+	)
+	sum([
+	    for(i = [0:leng - 1])
+		ord(s[i]) * pow(31, leng - 1 - i)
+	]);
\ No newline at end of file
diff --git a/src/collection/hashset.scad b/src/collection/hashset.scad
index f3d46021..f4561169 100644
--- a/src/collection/hashset.scad
+++ b/src/collection/hashset.scad
@@ -1,4 +1,4 @@
-use <__comm__/_str_hash.scad>;
+use <../__comm__/_str_hash.scad>;
 use <_impl/_hashset_impl.scad>;
 use <_impl/_hashset_add_impl.scad>;
 	
diff --git a/src/collection/hashset_add.scad b/src/collection/hashset_add.scad
index 8897b8ae..3418a7ad 100644
--- a/src/collection/hashset_add.scad
+++ b/src/collection/hashset_add.scad
@@ -1,4 +1,4 @@
-use <__comm__/_str_hash.scad>;
+use <../__comm__/_str_hash.scad>;
 use <_impl/_hashset_add_impl.scad>;
 
 function hashset_add(set, elem, eq = function(e1, e2) e1 == e2, hash = function(e) _str_hash(e)) =
diff --git a/src/collection/hashset_del.scad b/src/collection/hashset_del.scad
index 0ee22c8c..b90215bf 100644
--- a/src/collection/hashset_del.scad
+++ b/src/collection/hashset_del.scad
@@ -1,4 +1,4 @@
-use <__comm__/_str_hash.scad>;
+use <../__comm__/_str_hash.scad>;
 use <../util/slice.scad>;
 
 function _find(lt, elem, eq, leng, i = 0) =
diff --git a/src/collection/hashset_has.scad b/src/collection/hashset_has.scad
index 13b0bc16..612dd0ce 100644
--- a/src/collection/hashset_has.scad
+++ b/src/collection/hashset_has.scad
@@ -1,4 +1,4 @@
-use <__comm__/_str_hash.scad>;
+use <../__comm__/_str_hash.scad>;
 use <../util/some.scad>;
 
 function hashset_has(set, elem, eq = function(e1, e2) e1 == e2, hash = function(e) _str_hash(e)) =