diff --git a/src/m_scaling.scad b/src/m_scaling.scad
index 64c6a501..8bfe1f40 100644
--- a/src/m_scaling.scad
+++ b/src/m_scaling.scad
@@ -1,6 +1,8 @@
-function m_scaling(v) = [
-    [v[0], 0, 0, 0],
-    [0, v[1], 0, 0],
-    [0, 0, v[2], 0],
-    [0, 0, 0, 1]
-];
\ No newline at end of file
+function m_scaling(s) = 
+    let(v = len(s) == 3 ? s : [s, s, s])
+    [
+        [v[0], 0, 0, 0],
+        [0, v[1], 0, 0],
+        [0, 0, v[2], 0],
+        [0, 0, 0, 1]
+    ];
\ No newline at end of file