diff --git a/src/__comm__/__angy_angz.scad b/src/__comm__/__angy_angz.scad
index d2a7f990..21e34fa4 100644
--- a/src/__comm__/__angy_angz.scad
+++ b/src/__comm__/__angy_angz.scad
@@ -1,6 +1,6 @@
 function __angy_angz(p1, p2) = 
     let(v = p2 - p1) 
     [
-        atan2(v.z, sqrt(v.x ^ 2 + v.y ^ 2)), 
+        atan2(v.z, norm([v.x, v.y])), 
         atan2(v.y, v.x)
     ];
\ No newline at end of file